I have an instance of Visual Studio 2022 (version 17.12.0) that is losing the upper-right GitHub Copilot, feedback icons. The same also occurred in 17.11.x using VAX 2520, and 2537.
If I uninstall or disable Visual Assist they come back. Or if I run the Visual Studio installer Repair, which uninstalls Visual Assist, then it also comes back.
I attached my .reg settings on the link above if you want to try to reproduce it. This is the only machine I have Visual Studio 2022 installed on, so it's the only one I have to test.