Don’t they have safeguards against duplicate genuine accounts? How are folks making duplicate malicious ones?
I once tried to create a new account with my real name in order to maintain Facebook Business Manager without using my private account. The new account was immediately locked until I added a phone number. I added my business number, which was immediately rejected. I added my personal number which immediately resulted in my private account being locked instead.
So I gave up and don’t use Facebook for my business.
I have an alternate profile that’s also under my real name which is 10+ years old, previously used to keep a distinction between friends and family, and it works just fine.
(I have the same experience with my dupes, except I’m not active, though I am more active than my dupes)