In both chrome and firefox on my android phone, when the "desktop site" toggle is on, cohost still gives me the mobile UI. At first I thought it might be because the desktop site also switches to mobile UI based on the browser window's aspect ratio, but rotating the screen to landscape mode doesn't change it.
I wasn't sure whether to put this in feature requests or bugs and issues. Sorry if it's in the incorrect section. This is a built in feature for just about every mobile browser, though, so if I request a desktop site, I expect a website to honor the request, and I consider it an issue if it doesn't. I don't care if I have to zoom out to see the whole page or zoom in to read text.