Maybe you can give the neovim plugin for vscode a try. As a long time vim/neovim user who occasionally do some C# modding stuffs in vscode I find it one of the best "vim" mode plugin out there. The fact that it spawns a real neovim instance makes it working great with your existing neovim config, no need to learn how to add your custom other-than-default vim keymaps using some json config files, it just works, even for navigation plugin like leap.nvim (if my memory is correct).

Zed seems to be using its own vim emulation and config syntax is a huge caveat to me.