It's doable and even logical, since the Mac Studio starts with an M1 Max. But an M1 Pro (M2 Pro) in the Mac mini should still require a thermal redesign. Apple will probably want two fans and a bigger exhaust to keep the Mini quite under load.Awhile back I just hoped that Apple would at least stick a M1 Pro in a updated Mac mini or a larger iMac.
The larger iMac will come and it might even start with an M2 Pro at the entry level.