That’s an odd thing to say “Biden loyalists” when there’s no Biden running. There’s literally nothing to be “loyal” to.
But let’s separate this out, she brought on Obama campaigners because she needs the energy they brought to the election campaign. When it comes to her staffing the administration if she wins, I wouldn’t be surprised if she brings back many of Biden’s secretaries and other staff, who you would call loyalists but really are just good workers.