If you are using Unity version 2020.3 and Microsoft Visual Studio 2022 intellisense is not working, this video shows how to solve it. I was working on Oculus Quest 2 game development and was using XR Interaction Manager. I had added some hand animations and had attach a C# script to it and ran into this issue with Visual Studio 2022.
Hope this solution helps you guys out.
Oculus Quest 2 Development Tips Playlist:
• Oculus Quest Development Tips