Yes, your understanding is generally correct. If you are admitted to NEET UG through the All India Quota (AIQ) in a state other than your home state, you will be eligible for your caste reservation in the 50% AIQ seats in NEET PG.

However, when seeking admission in other states (excluding the one where you did your MBBS) for NEET PG, you will generally be considered under the Unreserved (UR) category for their state quota seats.

Hope it helps!!