After all NVRAM and PRAM resets I held down command+option+shift+R
This is supposed to be a combination to install macOS version it was shipped with, for me it was Catalina.
Such a close call for my MBP2019. I shouldn't try to do clean reinstall of Big Sur from beta to release on Friday 13th 2020 - the worst combination.
Erik_Hric
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Same here, iOS apps work. Even native macOS apps are fine. Only catalyst stuff is affected. I also opened an issue through Feedback Assistant app.
Thanks for the suggestion with manual launch! 👌