Samsung currently has an unremovable spyware app on North American phones that pastes (records) everything copied to the clipboard by any app. It is the Samsung Keyboard app. It cannot be removed. It doesn't matter if you're using any other keyboard app. Samsung Keyboard pastes (records) everything that gets copied to the clipboard by any app. The Samsung Keyboard app cannot even be disabled from Android.
As an aside, I recall getting a lot more ads when I used Samsung Keyboard.
Sometimes I will see a small random "copied" floating notification (not in the notification tray) and I always wondered where it came from. Maybe they have put in some code to suppress it but due to some bug, it leaks out. No proof but I can only hypothize.
It's a slippery slope. Apple is as bad as Google was about 10 years ago and things seems to be degrading faster and faster. Give it another 5 years and they will be as bad as Google/Samsung is today.
As an aside, I recall getting a lot more ads when I used Samsung Keyboard.