If I have been allotted a seat in stray vacancy round, is there any way to give the PG exam again and not get debarred?

If a seat is allotted in the stray vacancy round of NEET PG, and you do not join it, you will likely be debarred from participating in future NEET PG exams and forfeit your security deposit.

some state counseling guidelines may allow participation in their subsequent rounds even after an AIQ allotmen

Yes, if you've been allotted a seat in the stray vacancy round and wish to appear for the PG exam again, *do not join or report to the allotted college*. Once you join, you may get debarred from future attempts. Skipping admission keeps you eligible to reappear. Always check official MCC or NMC guid