Board Thread:Support Requests - Getting Technical/@comment-33208058-20201018221454/@comment-45117243-20201019190131

This invokes the desktop editor. To invoke the mobile editor you need Special:MobileVisualEditor?page=PAGENAME

I find this form very hard to use by manually altering the URL, and accessing it directly is possible only on article and blog pages while viewing their mobile skin.

However, the 2010 editor is fine too, and I found out how to invoke it even when it's not defined as your preffered editor: ?action=edit&veswitched=1