Terminated case

One of my friend get terminated from company and she had to exit the Bahrain
She can come back to baharain or no??

How I can I know that she is not ban or. Blacklisted??

Plz help I want to come her back in Bahrain

You need to give more details for anyone to be able to answer that.

A straightforward termination of employment and then exit does not lead to a ban.

You can not know until you apply for her visa or by approaching immigration to check.

So how can I check

I have responded above to that question already.  Read carefully.