Long pressing there also gives me a "request without ad blockers" button which I've found super useful as well. A bit weird this option isn't in the Share Sheet like desktop mode is...
also isn't it weird that this is called the "Share Sheet" but has lots of buttons for non-sharing related things?
The whole "Share Sheet" is rather confusing. It has three categories of actions in one screen. Potentially useful options are hidden wayyy down the list (like this Request Desktop Option). Even more options are hidden inside "More" menu all the way at the end. Which is also where the re-ordering controls are – although I just realized the icons can be reordered with drag-and-drop.
All in all, not very discoverable for a feature with such high utility.
It took me a second to realize that "Request Desktop Site" is available in the Share Sheet. I use it by long-pressing the refresh button.