hi https://www.wowhead.com/item=36428/bouquet-ring is listed in a timewalker vendor but is a zone drop of all lich king dungeons and raids

Looks like some sources for this have disappeared... likely because it isn't collectible it's less useful to list it in many places in the addon. Going to close this issue since there's nothing really needing to be done for this.

oh boy blizz is fucking a lot with this bonus id

I used a link from Wowhead:

It's already listed as a world drop, you are not seeing most likely because it has some additional bonusID.