Davinci Resolve Studio 20.0 b2 keeps crashing when I'm trying to open it every single time. I have to reinstall Version 19. It works well. I also have Final Cut Pro and Premiere installed. They are working well.
You'll need to provide more detail. Go to the Help menu and 'Create Diagnostics Log on Desktop'... put the resulting file on a file sharing website (like Google Drive, Dropbox etc) and post a public link to it here.
I have a 2020 M1 Macbook Pro (16GB) test machine and Resolve Studio 20b2 is working for me.