I think people immediately cringe commingling their work and social lives. Personally I think it's a huge over-reach that Meta requires their employees use their personal account as their work one too, but maybe that's not true anymore?
FTEs generally require an FB account to start the tech device provisioning process.
The only thing that goes in from personal -> work is music or random home office photos.
The only things that go out from work -> personal are public résumé-level performance reviews, tax, and benefits information.
Exceptions on work devices include Github and streaming services, but otherwise not much else should be co-mingled. Everything else stays in its own domain.
(I don't use personal social media accounts so I'm the wrong target audience. Personal FB and Insta accounts are linked to work, and Github if you have one.)