Using Mac:
Anyone knows why the Visual Studio project selector stays on the screen like a modal window?
How can I get rid of this?
This may help you with intellisense and possibly other Visual Studio integration problems:
Sometimes the fix is as simple as doing Assets → Open C# Project from Unity. Other times it requires more.
Also, try update the VSCode package inside of Unity: Window → Package Manager → Search for Visual Studio Code Editor → Press the Update button
Also, this: No suggestions in Vscode
Thank you but sadly those fixes did not help.