I have no Mathf functions after fresh install of VS

Im visiting family and installed Unity and VS onto my laptop. I noticed that when I try to use Mathf functions that its not highlighted and doesnt work. I tried many others and lowercase mathf but nothing does the trick

It worked perfectly fine on my other PC but its not on this. I tried adding “using System.Collections;” at the top, didnt work.

None of your Unity integration seems to be working.

Make sure the Unity integration for Visual Studio is installed: Install & configure Visual Studio Tools for Unity | Microsoft Learn