We have not had any issues here connecting to iPhone hotspots. iPhone 10, 11 as well as an iPad Pro with cellular all have been working without issue.
Turn off your wifi on the SC, turn off your hotspot, wait a few seconds, turn your hotspot back on, wait a few seconds, turn your SC wifi on and let the wifi networks populate. If the hotspot isn't showing, I believe you can hit the three dots in the upper right to refresh the network list. Hopefully you will need the hotspot and be able to connect.