This job has now been completed. Many thanks to anybody contacting me

You can do the below and then enable a tap to zoom interaction on your product. The downside is that it will need to zoom according to a point of origin you’ve assigned and that means it will only zoom in on one area. I’m guessing you’ll need a panning function too.

I tried using an attribute “user-scalable=no” on an individual element but it doesn’t work. Even if it did work, the position of your arrows will be unpredictable since other elements on the page will be shifting their absolute position.