https://support.apple.com/guide/security/app-code-signing-pr...
> On devices with macOS 10.15, all apps distributed outside the App Store must be signed by the developer using an Apple-issued Developer ID certificate (combined with a private key) and notarized by Apple to run under the default Gatekeeper settings.
Re: Developer ID Certificates: https://developer.apple.com/help/account/certificates/create...
I suspect the friction that users are facing are due to dodging the above requirements.