I come with a suggestion. I think a checkbox in the settings that prevents zooming in and out on the mobile PWA (= Shortcut on home screen or app bundled with pwabuilder.com in my definition) of a discourse page would be very useful. I have demonstrated it in the video
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
If you put these lines in the header in the theme you can’t zoom in and out in the mobile PWA (in Safari I can still do it and it’s okay that way). I just think that a mobile PWA should behave like an app. And maybe Discourse should bring this feature right along in the form of an optional setting.