Zed uses tree-sitter and LSP; most popular languages do not require extensions, and extensions for niche languages are shockingly easy to write. Literally 100-300 lines of Rust boilerplate and around 300 lines of config boilerplate, with minimal maintenance/upkeep.

https://zed.dev/docs/languages/cpp

Many words to state that it doesn't.

Many words to explain that it doesn't need one, as you can see by clicking that link.

No idea why they worded it the way they did. But the answer is: yes, Zed has something comparable, using clangd as a C and C++ LSP server.