I didn’t know about this until now, but there is a feature called “back tap.“ It allows you to trigger specific actions by tappingeither two times or three times on the back of the iPhone. You can set this to zoom in or out.

This is where ChatGPT says to go:

1. Go to Settings > Accessibility > Touch > Back Tap.
2. Choose Double Tap or Triple Tap, then select the action you want to assign.

iOS has an accessibility feature where you can tap two times with three fingers and zoom the screen. If you hold on the second tap and upward it will zoom in a custom amount. Sliding down zooms back out. Would that work? It would be independent of all web browsers.