Maybe it has something to do with me running this on a kindle fire? I could be straight up blind though and missing something obvious. I appreciate the replies to try to troubleshoot this!
Okay, so the option not being there indicates that the game doesn't recognize you being on a mobile device. I will try to look into this, unfortunately not much you can do about it, I think, apologies!
Might be a tablet issue, or maybe unique to the kindle fire haha. Can't imagine too many people are playing on this. No apologies needed, the game works great and the low performance mode was perfect for my device!