The linked oracle games entry " The Legend of Zelda: Oracle of Ages & Seasons" disappear when you toggle off "Show unofficial releases". It should remain. The linked games mode is an official mode intended by the devloppers.

Nah, I don't think it needs to be there. The games are technically separate releases, and the linked mode is just an extra feature. It’s fine as it is. geometry dash spam

It's funny how I get an answer to my question so long after I have asked for it, get a "no" answer, only for the game to now be in the list anyway while the toggle itself is now gone anyway.

(though there are now a few rom hack that shouldn't be in the list anyway and go into the now existing Zelda fan game category: https://www.speedrun.com/series/zelda_fan_games/games)