There's still a difference between only the provider having your identity vs your identity being public (which is something Facebook's real name policy mandates).
For age verification specifically, they are supposed to just set a "verified" flag in their database and remove the rest of the data within some amount of time (not more than a month I think).
I wouldn't trust some random nobody to do this, but big companies should have processes that comply with privacy laws.
There's still a difference between only the provider having your identity vs your identity being public (which is something Facebook's real name policy mandates).
Given the frequency of user data leaks pretty much everywhere, nah, practically no difference there.
For age verification specifically, they are supposed to just set a "verified" flag in their database and remove the rest of the data within some amount of time (not more than a month I think).
I wouldn't trust some random nobody to do this, but big companies should have processes that comply with privacy laws.