I don’t have Apple Silicon M1 MacBook Pro and JUCE works fine for me on macOS Monterey 12.1, but you might experiment with some settings.
Have you tried to change Security & Privacy settings? On Privacy tab you can find options for Files and Folders and Full Disk Access.
You might check settings on General tab as well and set
Allow apps downloaded from:
- App Store and identified developers
Are there any differences in behaviour between version built on your own and released by JUCE?
Where do you have your Projucer application on disk? Maybe moving to different path will change this situation?
P.S. JUCE 6.1.5 is available.