Yes.

I have been called by a variety of restaurants and drivers 7 times since March 2023 while using Deliveroo - who all came through the same London phone number.

I don't even live in London.

A search online for the number (020 3871 3395) shows that others have been called by both drivers and restaurants on this number. [1]

[1] - https://who-called.co.uk/Number/02038713395

How does the fact that you can't see their number imply that they can't see your number?