I don’t know if this is really any help but at least with Android you can put an icon on your home screen that gives you direct access to the mobile version:
Open the page you want the icon to open at, e,g, “latest” in the forum, and click the three dots at the top on the right hand side:
You should get this dropdown menu and select “Add to home screen”:
You should then get this page and click “add”:
You should then get an icon on your home screen looking looking like this:
If you click the icon it should directly open the mobile web page….I am not sure if this quite what you wanted?