Update on the HSBC situation:
I was able to open a premier account on the HSBC mobile app by uploading my offer letter.
I later got a call from my assigned RM who told me that he would try to get approvals for an exception on the 3L min salary limit as my company was not onboarded onto the HSBC companies list. He also told me this would be for the conversion to a "true premier customer" and I would be able to avail all the benefits of a premier customer