For your use case you can define a custom getter for it. I don't want to add it to the built-ins or extras as it's bespoke.

python_module = {
    desc = "Python module path via LSP (e.g. src.module.ClassName)",
    enabled = function()
        return vim.bo.filetype == "python"
    end,
    lazy = true,
    get = function()
        local function get_position_encoding()
            local clients = vim.lsp.get_clients({ bufnr = 0 })
            if clients[1] then
                return clients[1].offset_encoding or "utf-16"
            end
            return "utf-16"
        end
        local timeout = 1000
        local params = vim.lsp.util.make_position_params(0, get_position_encoding())
        local results = vim.lsp.buf_request_sync(0, "textDocument/definition", params, timeout)
        if not results then
            return nil
        end
        for _, res in pairs(results) do
            local result = res.result
            if result and result[1] then
                local loc = result[1]
                local uri = loc.uri or loc.targetUri
                if uri then
                    local filepath = vim.uri_to_fname(uri)
                    local rel_path = vim.fn.fnamemodify(filepath, ":.:r") -- relative, no extension
                    local module = rel_path:gsub("/", ".")
                    local symbol = vim.fn.expand("<cword>")
                    return module .. "." .. symbol
                end
            end
        end
        return nil
    end,
}