A buyer who already sees your mobile number displayed as your bank account don’t need to ask you for it anymore and many of them already jump into your dm without any permission sending you messages even though that they can just chat with you there on the exchange that is an attack on someone private space.
No matter how close or friendly you get with such person, don't ever accept to do P2P with him or her outside the exchange. Scammers are the most friendly people.
That’s not all you could be in more danger having your mobile number on an exchange
. If you can avoid it then you should rather use a bank account that is not in the form of your mobile number don’t say it doesn’t matter.
The reason most people use these fintechs is that their networks are faster for receiving funds and not just that it's safer. I've literally used Access Bank for P2P earlier when I didn't want to disclose anything that would expose my number but my experience with their slower network made me rush and add my OPAY as a bank option for receiving funds.