hey, i'm just a passersby, but just so you know, there's a website (commonly referred to as the "ao3 exchanges app" in the circuit) that you can use to easily browse requests (in contrast with the ao3 requests page which is a nightmare to navigate.) this year's smut4smut one is here: https://autoao3app.fandom.tools/#/smut4smut2024

it will only show fandoms with requests by default and you can "scrape" the exchange to check for new additions (people will do it semi-regularly in my experience.) once sign-ups close you can bookmark specific requests, and you can also bookmark specific fandoms at any time. hope that helps you in your treat endeavors! :)