Merge was proposed in Sep 2020. You should have received an email at that time to accept to reject it. It seems that was not done because after 30 days anyone can complete a merge, which was done earlier, but it was not done by the other PM, as I determined from looking through the Changes Log. The other PM did remove the parents from this profile but there is nothing on the profile as to why they were removed, so I have sent him a message, asking about that. I also don't see any sources to prove those parents are for this person.