I used to be a CLion user. Unfortunately, it could not keep up with our large and heavily templated C++ codebase. Although CLion Nova with the new ReSharper engine improved things a lot, we found our custom clangd with emacs/vim/VSCode to still be much faster and convenient.

I know CLion also has clangd, but I believe it's their own fork. I am also not sure if you can enable all clangd features since it's not the main engine. I'd be happy to hear people's thoughts about this.