Previous Channel Button

I’m sure this has come up before but I haven’t found anything that is specifically this. Instead of a shortcut (which I honestly didn’t know existed till now) it would be nice to have a button for going back to the previous channel visited (including on mobile - I use the movile version a lot more). I sometimes browse between channels and have to go to a different one, then remember something from the one I had open previously but cannot find where it is (some servers have a million channels). It’d be nice to have a button for this.