I dont have an Ipad, but I did use my phone as a wifi hotspot, with my android tablet connected to it and my Inreach+ via bluetooth. I was using Gaia maps as a reference, but did the tracking and navigation with the Garmin app, albeit I had maps for both apps saved on the tablet ahead of time. The Garmin was great, and had most of my trails loaded from TrailDamage, made Moab a lot easier and more fun. Right now, I have no need to try a separate GPS receiver to use Gaia instead of the Garmin app, but I may change my mind later.
Want to add this. The Inreach is not a replacement for a good PLB. Period. Its a nice thing to have just in case, but I would recommend anyone to use an ACR or equivalent for serious rescue gear, and does not require an active subscription to use it (as does the Inreach).