Could you clarify whether you went through our Connecting to iOS hotspot video guide? If so, may I ask you to specify at which step the issue occurs?
Also, if you have iPhone 12, please enable the “Maximize Compatibility” option in the Personal hotspot settings. It will switch the iPhone hotspot network to 2.4 GHz.
Sorry, I thought that you’re not able to connect to the iPhone hotspot at first. Now I see that you can’t access the devices in the ReachView app. Could you clarify whether you work with the latest version of ReachView 3?