Motor and Transmission transfer from 2022-2019

I just want to know if I took a motor and transmission from a 2022 Charger Hellcat donor car and put it in my 2019 Charger Hellcat would I be able to use the 2022 transmission or would I have to buy a 2019 Transmission ‼ The reason I ask is because I was able to get a donor (2022) car to rebuild my recked Hellcat (2019) but the shop that's doing the work wants to sell my donor car transmission (2020) which is practically brand new and are saying I will need to purchase another (2019) reason for this is that there saying it want match my pcm, something about a different vin associated with the chip in the trans, the plug from the harnesses may be different even though I'm using the harnesses from the 2022 on my 19‼
Not sure how true this is but I really think there just trying to steal my donor transmission and make me buy a new one for no reason ‼ Please advise ‼




Sorry if this is posted in the wrong place please move to correct area if so...