I just ordered the same sort of thing as well.I use my phone. Android one though. Last 2 phones of mine, I have chosen specifically by camera specs. My most important requirement was simply to have lens with optical stabilization, so I would not need a gimbal. It does help, if I use a mini tripod as a handle though, to reduce hand shake.
How many of you use your iphone for filming while not on the bike? I have recently started doing that and looking for a recommendation for a gimbal for the iphone 12 ?
I do use my phone on occasion, but prefer (when it works) to use my GoPro Hero 9 with the Max Lens Mod fitted as it is very stable. The issue is sometimes it can be hard to frame the shot properly as the rear screen switches off after 1min, whereas with a phone it stays on.