Gordian Seed Tool for iOS

I am using an old iPhone 8 with the Gordian seed tool, and I have been wondering what could possibly be some weaknesses in my setup?

I have deleted all the apps I won’t be using. There’s no phone app, no messaging app, no web browser, no iTunes logged in, no iMessage. All the settings like location sharing, app permissions, data tracking, analytics. Everything is turned off, no WiFi, no SIM card, in airplane mode.

I am currently using sparrow and electrum on my laptop, and blue wallet on my regular phone. Everything is done via airgapped with QR codes. I am ocd as to not allow any other cameras to see these codes.

I have considered having the wireless antenna disabled. If anyone could maybe think of some ways I could better secure this device, I would greatly appreciate the feedback.