Man I'm watching Tech YouTube videos from ~10 years ago and they feel like a window to such a radically different world. People used to care about shit.
The typescript language server will only show diagnostics for buffers it's already attached to, so if you want a list of all the errors in your project use tsc.nvim.
@string2num I haven't needed any support so I can't speak to that, but this was one of the first times I just spun up a docs site and barely thought about anything but the content.