Hello @Mikey Mann ,
Welcome to Microsoft Q&A forum.
Please firstly try to search "Edit the system environment variables" in Windows Search box, click to open it => Environment Variables… => under System variables => select Path => Edit… => move up and make sure that C:\Program Files\dotnet\
lists higher than C:\Program Files (x86)\dotnet\
=> relaunch VS.
Besides, please try to create a .NET Framework based project and check if it works, for example, .NET Framework 4.7.2/4.8 project. The project template you selected should be .NET currently.
Best Regards,
Tianyu
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