Protobuf finally gets a production-grade LSP server
Protobuf has LSP support. You're welcome

Buf has released the first fully-featured LSP server for Protobuf, bringing modern IDE support to the schema language for the first time. The server, bundled with the Buf CLI, offers features like go-to-definition, code completion, and incremental compilation. It's available for VSCode and Neovim, with plans for more features like automatic imports and Protovalidate support.
We don’t want to overstate our own work, but this is a game-changer for Protobuf development: Protobuf now has modern IDE support for the first time, all powered by the Buf CLI.