H4 and H4 EAD COS

Hello,

I am currently awaiting my H4(COS from L2) and H4 EAD approval.

Would you please help me with the following query: My I-539(change of status from L2 to H4) and I-765(h4 ead) were concurrently filed three months back. I have received RD for I539 but not yet for I765.

Can you help me know how such cases are processed? are i539 and i765 adjudicated together?
My I94 is valid till Feb22

Thanks!