[perfectstorm]

I copy my password from my password manager and paste it into a different app. I can copy notes from OneNote and paste it into my email and there are many other use cases i can think of. With iOS 14 Apple is letting the user know that some app is accessing your clipboard.

[ebg13]

All of your examples are things initiated directly by the user. There's no reason that preserving user-initiated "paste" needs to mean letting an app take what it wants.

[perfectstorm]

it wasn't clear from OP. i suppose having a permission modal like Photos or Contacts will do.