In the official Reddit app it's a floating button and you can move it wherever you want without going into the settings. One (maybe the only one) thing I preferred over Apollo.
Just so you know, the buttons are redundent. You can swipe left out right on the comment depending on what you're trying to do. I think the button should disappear though at the end.
does memmy have a spacer at the bottom of comments so you can scroll down a bit more at the end of all comments or is that the lowest you can go right now