While it is a shame native apps are so often much more limited in usability than webpages, the grandparent does point out that part of the annoyance is disablin

While it is a shame native apps are so often much more limited in usability than webpages, the grandparent does point out that part of the annoyance is disabling it on purpose. Zoom in native would be great but it's something you have to implement, not a feature you get for free that you explicitly go out of your way to remove.