Why hasn’t my state return been received when it’s been over 2 month since getting accepted and I received my federal return over a month ago?

First make sure your state return was also accepted.  

https://turbotax.intuit.com/tax-tools/efile-status-lookup/  

Federal and state refunds come from completely separate entities.  You cannot expect them to arrive at the same time.

To track your state refund:    

https://ttlc.intuit.com/questions/1899433-how-do-i-track-my-state-refund