[oauea]

https://developer.apple.com/documentation/xcode/notarizing_m...

> Beginning in macOS 10.14.5, software signed with a new Developer ID certificate and all new or updated kernel extensions must be notarized to run. Beginning in macOS 10.15, all software built after June 1, 2019, and distributed with Developer ID must be notarized

[pseudalopex]

That just says signed apps and kernel extensions must be notarized. Unsigned apps still work.