I have messaged Barbara from the Birthday Swap group to see if she has a list of the posts where the “clues” are given. I have not yet gotten a response from her. If you want to search yourself, True4uca, the mystery QAL was in the 2018-2019 Birthday Swap thread, found in the Swap section of the board. The first clue appeared around March or April of 2018, and new clues came out every 2 weeks, always posted by barbarakibbler. If you can find the first one, you should be able to skim along and find the rest.
When I hear back from Barbara I will post her response here.