I currently have 29 Discourse sites that I scan every day. Some of these sites have high volumes of posts. For reading the high volume sites on my Android phone, when scanning down a list of hundreds of topics but only clicking on and reading a few, it would be convenient after reading the topic and hitting the “Back” button, to return to the same place I was in the list of topics - before I clicked on the just read topic - instead of being sent back to the beginning of the list and having to do a whole lot of scrolling every time . .
I’m not following here. That’s the way it should work by default.
If you visit https://meta.discourse.org, scroll down, click on a topic, then hit the back button, you’ll be taken back to the exact spot you were on before - there’s also an animation that triggers to let you know. This works on both desktop and mobile.