On iOS: tap the share button in browser => add to home screen
On Android: tap the 3 dot menu button in browser => tap “install” or “add to home screen”
Actually I ran a current development build of the app which seems to have the feature already. There is a small chain icon next to the vote arrows which jumps to the comment and it’s parent and allows to load even more context. So maybe it will ship in the next app update when release :)