The bearing cups on the RT622 hubs were not intended to be removed by design. There is no edge or lip of the bearing exposed that allows driving out the bearing cups.
I replaced bearings on a local riders RT622 years ago. For that task, it required that I create the means to get to the bearing cup. For that, with the hub off and degreased, I used a straight die grinder, with a carbide rotary file and by hand carefully cut two notches per bearing cup area in each hub casting. This semi circular notch allowed me to drive out the old bearing cups. With the cups removed, again by hand with the same tools, I made each notch cut, look pretty, uniform and as if made at oem.
I did not use the welding technique, and will not if ever replacing bearings on our RT622, but many say this works. You use a stick welder or MIG welder and run a simple bead around the bearing cups wear surface. Word is, as the weld cools, the bearing cup shrinks and will drop out. Never tried this, but have read it works.
Overall though, a poor design unless you just replace the hubs as Can Am expects. Notching the hub is easier and less risky, but does require proper tools. You might get it done with a Dremel, but I doubt it and it would take a long time. The die grinder and carbide cutter, for all 4 areas took maybe 30 minutes from start to tools put away.