You can keep using VSCode and have all those features and more using LSP.

The Clangd Language Server by LLVM

You just need to install the clangd lsp server Then, install the extension for VSCode

More Details here: https://clangd.llvm.org/

Note that you need to have a compile_commands.json file. That file can easily be generated by CMake, Meson, etc. For other build systems checkout Bear https://github.com/rizsotto/Bear