It does have it though. Been using it for at few years already with coc.

I know, but previously, the inlay hints would be displayed at the end of the line in Neovim, making them near useless.

Huh, does it work inline in Vim with Coc?

Yes that’s right!

Vim has had inlay hints for a while now, whereas neovim has had it for like 3 days. I think that this is what GP was referring to. Both vim and neovim have LSP support (the former via plugins).