Disable double-tap to zoom

Is it possible to disable the double-tap zoom feature on iOS14?

I've been unable to find a setting to disable it and the CSS based solutions that I've found do not seem to work either.

The application that we try to use on the iPads is a web app that uses the whole screen space, but should not scroll or zoom. Those iPads are used mainly for this purpose so it would be okay to disable it devicewide, but if possible we'd disable it only on our websites.

Thanks for any hints.