H4 EAD receipt not received more than 30 days


I had recently had done the job change, and my h1 got approved. My wife is on H4 receipt. As our employer was not supporting on EAD filing, I filed my wife H4 EAD (i-765) after my H1 approval on Dec 29th 2020. Till now she has not received the email/text or notice of action/receipt. I had put a cashier check, so i am unable to know if that was encashed or not. What is the way to track my receipt?
Also, if you apply for EAD after your H4 receipt, would you get a separate receipt or the same receipt number gets tagged for EAD?
Pls advise.