I use the Quad Lock, which has been discussed in other threads. I'm very happy with mine. I have mounts on both my bikes, a mount for my car's windshield, and an armband mount.
The downside with this product is you have to buy a case, which is a bit on the bulky side, and it does give the phone a thicker profile.
The upside is once the phone is in the mount it is VERY secure.
Recently, I was riding up a steep trail on my e-gravel bike. I cranked too hard on the pedal while the motor was in turbo mode and I wheeled right over and down I went. Happily, I didn't hurt myself or damage my bike, and the phone stayed securely in place.