I agree. I think it should work. Most of the time linux stuff is much more hardware agnostic than, say Windows. I also think that the chance of anything major breaking when you try running it on a Pi 4 is close to zero.
However, if you are on an old version of Piaware, it may be a good time to go ahead and upgrade, or just rewrite everything on a new SD card, since SD cards do fail over time.
@abcd567 is a genius and has a guide for this. He has a guide for everything.
I don’t use raspberry pi but from what I gather there is a newer operating system. I think the old one was called Bullseye and the newer one bookworm (circa 2023?) There have been discussions on here re: piaware and bookworm, but I didn’t pay attention to them, so maybe @abcd567 can enlighten us. It looks like the recommendation, at least a few months ago, is to continue with Bullseye OS for now.