I literally need this! I have so many mods downloaded, but I know there are more that I would love but are almost impossible to find because of the amount of content in the app. I try to use the other filters like sort alphabetically or by most recent update, but that's just not doing it for me. I want to be able to filter by popularity and also by content I don't have downloaded yet. Having to scroll through all the content I already have, trying to find stuff I don't have is like searching for a needle in a haystack. Its easily missed. Adding this filter would allow players to have an easier time finding new content and would give content creators more of a chance to have their content be recognized by players.