Sounds like they long left Facebook. Only danger is Meta realizing that these request all come from one source and blacklisting them. That said, Meta must received tens of thousands of appeals, so it'd be easy to lay low.
But yes, I have no clue what employee inside would agree to work on this for an extended period.
Internal requests are very likely not in the tens of thousands - they're probably processed entirely separately. It'd be easy to spot one employee constantly filing these requests for random people.
I assumed these were people using internal Customer Service tools. It would be pretty hard to spot the activity that way - if their job involves using those tools
But yes, I have no clue what employee inside would agree to work on this for an extended period.