Yes @j.jaffeux - I am sure desktop is not being used on mobile. On mobile for my discourse site I am using the wonderful Chat Bubbles component by @chapoi and it works flawlessly on phones.
The issue is that iPad always gets desktop and not mobile (as you’ll also see in my screenshot for this site). I wish there were a way to force either iPad or devices in landscape to use mobile but I can’t figure out how to do that.
also @chapoi - to answer your question above, when people use iPad in landscape they never see that entire left rail in order to click on that little mobile icon (see my screenshot above).