After much googling for this issue, I found a way to make Gamma Protocol play much better on IOS browser. PICO-8 supports mobile controls when exporting to web by default and this works great on Android but for some reason IOS still seems to have pinch zoom enabled on the page which gets really annoying when trying to press two buttons at the same time. It turns out to disable pinch zoom all you have to add is this snippet into the CSS section of the exported index.html

body { touch-action: pan-x pan-y; }

I hope this helps anyone else using PICO-8!

Oh and here's a link to play the game! Mobile users can use the itch.io link to play!