Can I directly ask BRM or any other person above my rank to get PERM letter approval?

Actually I am facing issues in getting skill letter.

My previous manager and myself didn’t share a good relation, although I received everything without any issues from ffs 4 months ago.

Just want to understand, is this possible if I can directly reach to BRM or any other person who is above my rank to get the approval. Please suggest. thanks.

Yes, you can connect with anyone above your rank to get skill letter approval.