Hi, I’m current working for employer A (vendor) and have I40 approved in EB2 with them. Employer B (Client) is giving me an offer to get converted to full time employee. Employer B has promised me that they will start my GC process in EB2 as soon as I’m on board.
My question is.

Once the new I40 by Employer B is approved, can I use my previous priority date with Employer A?

I have 11 years of Industry experience with 10+2+3+2 with (B.Com, and M.sc (Comp Sc) from India. Will that be any issue with 140? What are the Chances of my new 140 getting denied or reviewed even though I have one approved with another employer?
What should I expect on my priority date getting current?