I added my telephone number to my Samsung Galaxy A36 lock screen, imagine the ability of someone finding your lost device having limited access using the device to send a message such as their phone number or where to pick up the phone. Imagine someone finding a lost device and taking it to the customer service center saying I found this device in the parking lot or left in the shopping cart, then the service center will notice an email or telephone number on the lock screen in which there would be able to use it in a limited capacity to send a message, they could call the number and the message would automatically going to voicemail or to the email link to the telephone number or text a different telephone number, they could say we have your device and you could find it at such and such customer service center.
