Yes:

https://github.com/equalsraf/neovim-qt

There are quite a few GUI front-ends options available:

https://github.com/neovim/neovim/wiki/Related-projects#gui

It's not officially part of the Neovim project. However they distribute it with the Windows installer.

Neovim-Qt and Neovide both work the same way, one is not more privileged or official or well-integrated with Neovim than the other.

Yeah but I don't find any upsides compared to nvim running in a modern terminal emulator like Konsole, Alacritty or WezTerm.

There are a bunch of them. None are really good IMO.