Update to 10.15 Catalina even though Big Sur is released I'm still on 10.14. I would like to work with Xcode 12 now, which only supports 10.15+. Yet, no direct download for 10.15 can be found anymore.
I do not want to make the move to macOS 11 Big Sur yet as it seems too unstable.
Turns out it is still in the App Store, even though a search did not find it.
Direct link: https://apps.apple.com/app/macos-catalina/id1466841314
Instructions: https://support.apple.com/en-us/HT211683