Can a business on Facebook block you from commenting on their page? If so how can you get unblocked and allowed to comment? ?

I'm commenting here because I can't comment on each individual post. I know someone who can comment on a business Facebook page but I cannot comment yet I'm able to see everything which is the weird part and I'm trying to figure out why this is happening because I shouldn't be blocked from commenting. There's one person I know who is being very petty like out to get me for some reason and she wanted to admit she blocked me from commenting but she did and everyone else involved are at least one person involved wants to reverse that but doesn't know how.

Yes, they can. Ask them nicely to unblock you.

They can Block you from liking the Page and Commenting but they cant just Block you Alone from Commenting on there Posts