Unlocked Sunbeam + Iphone + Garmin

Right now I'm on verizon and have an Iphone 12, with unlimited data etc. If I were to buy a sunbeam f1 pro and put my sim in it and then had my iphone at home as a hub - would this set up work? im also thinking of getting a garmin smart watch as im a big runner and want something that supports strava and spotify so I can still listen to music when Im out without a phone. If this did work, I imagine an unlimited data and hotspot plan would be a bit unnecessary... Let me know if you think this is a good set up and if anyones done something similar