Hellcat engine is done after '23 for charger/challenger so I would imagine it's not coming back for any other platform either except for the trx.
The only caveat is that suv's and trucks aren't subject to gas guzzler tax so there's a possibility albeit very low that the hellcat engine would come back for the trackhawk variant.
The trx should stay around after 23 because ram is fighting ford and it's raptor edition but I wouldn't expect more than a few years out of the trx, I'm guessing the hurricane inline 6 is gonna be the next big thing for stellantis in terms of ice vehicles.
If I were to bet I would say the trackhawk might return as a twin turbo 6 and compete against the explorer st, x3m, x5m, etc etc