Not in principle, but it's by no means a small feat.
Raptor 3 is supposed to be way more heat-stressed than the RS-25 and hasn't reached the design pressure yet. Promising rapid reuse at this stage of development is very ambitious.
They haven't reached anywhere near the turnaround with the much less stressed Falcon's Merlin engines.
Rapid reuse of the Starship itself is even more ambitious.
Raptor 3 is supposed to be way more heat-stressed than the RS-25 and hasn't reached the design pressure yet. Promising rapid reuse at this stage of development is very ambitious.
They haven't reached anywhere near the turnaround with the much less stressed Falcon's Merlin engines.
Rapid reuse of the Starship itself is even more ambitious.