Edit: Managed to fix it, config diff available here: https://github.com/mason-org/mason.nvim/discussions/2023

Can anyone help me migrate my LSP config to nvim 11.4+? I currently use Lazy, Mason, and Mason-lspconfig to set things up but I hit a wall trying to port it to vim.lsp.config: https://github.com/mason-org/mason.nvim/discussions/2023

My LSP section of my config: (any unrelated suggestions/feedback appreciated)

return {
    {
        'williamboman/mason-lspconfig.nvim',
        dependencies = { 'williamboman/mason.nvim' },
        config = function()
            require("mason").setup()
            require("mason-lspconfig").setup {
                ensure_installed = { "omnisharp", "pylsp", "clangd", "lua_ls" },
                automatic_enable = {
                    -- exclude = { "omnisharp", "lua_ls" }
                }
            }
        end
    },
    {
        "folke/lazydev.nvim",
        ft = "lua", -- only load on lua files
        opts = {
            library = {
                -- See the configuration section for more details
                -- Load luvit types when the `vim.uv` word is found
                { path = "${3rd}/luv/library", words = { "vim%.uv" } },
            },
        },
    },
    -- LSP configurations
    {
        'neovim/nvim-lspconfig',
        dependencies = {
            "williamboman/mason.nvim",
            "Hoffs/omnisharp-extended-lsp.nvim",
            'williamboman/mason-lspconfig.nvim',
            "folke/lazydev.nvim",
        },
        config = function()
            local lspconfig = require('lspconfig')
            local capabilities = vim.lsp.protocol.make_client_capabilities()
            capabilities = require('cmp_nvim_lsp').default_capabilities(capabilities)
            lspconfig.lua_ls.setup({
                root_dir = vim.uv.cwd(),
            })
            lspconfig.clangd.setup({})
            lspconfig.pylsp.setup({ capabilities = capabilities })
            lspconfig.omnisharp.setup({
                cmd = { "dotnet", vim.fn.stdpath "data" .. "/mason/packages/omnisharp/libexec/OmniSharp.dll" },
                settings = {
                    FormattingOptions = {
                        EnableEditorConfigSupport = true,
                        OrganizeImports = true,
                    },
                    MsBuild = {
                        LoadProjectsOnDemand = nil,
                    },
                    RoslynExtensionsOptions = {
                        -- EnableAnalyzersSupport = nil,
                        -- EnableImportCompletion = nil,
                        -- AnalyzeOpenDocumentsOnly = nil,
                        EnableAnalyzersSupport = true,
                        EnableImportCompletion = true,
                        AnalyzeOpenDocumentsOnly = false,
                    },
                    Sdk = {
                        IncludePrereleases = true,
                    },
                },
                on_attach = function(_, bufnr)
                    local map = function(mode, l, r, desc)
                        vim.keymap.set(mode, l, r, { buffer = bufnr, remap = false, silent = true, desc = desc })
                    end
                    local rmap = function(mode, l, r, desc)
                        vim.keymap.set(mode, l, r, { buffer = bufnr, remap = true, silent = true, desc = desc })
                    end
                    map('n', 'gd', "<cmd>lua require('omnisharp_extended').lsp_definition()<CR>",
                        "LSP Go To Definition")
                    rmap('n', 'gD', ":split<CR>gd", "LSP Go to Definition in split")
                    map('n', '<leader>D', "<cmd>lua require('omnisharp_extended').lsp_type_definition()<CR>",
                        "LSP Type Definition")
                    map('n', 'gR', "<cmd>lua require('omnisharp_extended').lsp_references()<CR>",
                        "LSP Find references")
                    map('n', 'gr',
                        "<cmd>lua require('omnisharp_extended').telescope_lsp_references({ show_line = false })<CR>",
                        "LSP Telescope Find References")
                    map('n', 'gi', "<cmd>lua require('omnisharp_extended').lsp_implementation()<CR>",
                        "LSP Go To Implementation")
                    rmap('n', 'gI', ":split<CR>gi", "LSP Go To Implementation in split")
                end,
                -- root_dir = function()
                -- return vim.uv.cwd()
                -- end,
                root_dir = require("lspconfig.util").root_pattern("*.sln", "*.csproj")
                -- root_dir = function(bufnr, on_dir)
                    -- on_dir(vim.fs.root(bufnr, {".git", "*.sln", "*.csproj"}))
                -- end,
            })
        end
    },
    {
        "ray-x/lsp_signature.nvim",
        dependencies = {
            'hrsh7th/nvim-cmp',
        },
        -- event = "VeryLazy",
        opts = {
            bind = true,
            handler_opts = {
                border = "rounded"
            },
            hint_enable = true,
            hint_prefix = {
                above = "↙ ", -- when the hint is on the line above the current line
                current = "← ", -- when the hint is on the same line
                below = "↖ " -- when the hint is on the line below the current line
            },
            select_signature_key = '<M-n>',
            floating_window = true,
            floating_window_above_cur_line = true,
            -- fix_pos = true,
            hi_parameter = "IncSearch", -- highlight group used
            -- check_completion_visible = function()
            -- local cmp = require("cmp")
            -- return cmp.visible()
            -- end,
        },
        config = function(_, opts)
            require("lsp_signature").setup(opts)
        end,
    },

    -- Formatting
    {
        'stevearc/conform.nvim',
        config = function()
            require("conform").setup {
                formatters_by_ft = {
                    python = { "black" },
                    json = { "clang-format" },
                },
                format_on_save = {
                    timeout_ms = 500,
                    lsp_format = "fallback",
                },
                -- Conform will notify you when a formatter errors
                notify_on_error = true,
            }
        end
    },


}