This is possible on desktop and useful. Why isn’t it possible to share qr to my current page on mobile? Or maybe it is hidden behind some menus and apologies
iOS version is built on same engine as Firefox, whereas Desktop and Android are built on Chromium. This leaves a lot of little differences between the two on the features and capabilities. Many of these smaller options like you’re sharing are things added “upstream” by the main team handling the engine. I’m guessing that’s part of the answer as to why one has it and the other doesn’t.
That said, at least we have your request and I’m sure it’s something that will come in the future.