jsmithh I'm not quite following what you're trying to do tbh, but in general if you're using an iphone or phone-based VR headset I would definitely encourage you to consider upgrading when possible, since the VR experience you'll be getting will pretty garbage compared to a dedicated VR headset: https://www.sexlikereal.com/blog/216-whats-the-best-headset-for-vr-porn
DeoVR for iOS is no longer supported since support for most phone-based headsets have been discontinued by their creators (Google with the cardboard/Daydream, FB/Meta/Oculus with the GearVR, etc.), so that probably won't be an option sadly.
Maybe if someone else is familiar and knows what you're looking to do specifically they can chime in, but in general I'd encourage upgrading if you're in a position to.