I updated my GPU driver to Version 20.1.2. The UI is different compared to the previous update. The system tab is gone, and some of my games won't run by default or choose radeon as GPU but would go to the intel GPU by default.
System and performance tabs are still there. This looks like bad installation on your end. Try using AMD Cleanup Utility and installing again
"The 'switchable' function has been removed from the graphics drivers for Win10 starting with the new 'Adrenalin 2020'. The option is now located under 'Display' of your computer...."Graphics'. "
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