[FEATURE PROPOSAL] Option to hide incoming caller ID when phone is locked

Hello,

A privacy feature I miss is the ability to hide the caller ID (name, phone number) when the phone is locked.

When locked during an incoming call, the phone would ring as usual (with a custom ringtone if set), but would not show any information about the caller.
Once unlocked, the phone would display the current screen for incoming call (caller ID, phone number, swipe to accept or reject, etc.).

This would be useful when your phone lay on a table, surrounded by people who don’t need to know who’s calling you…

It seems this feature already exists on some android :

Thanks !