hi after of using https://es.wowhead.com/item=166999 we can unlock one of these follower missions:

https://www.wowhead.com/mission=2112/treasure-map-molten-mayhem
https://www.wowhead.com/mission=2120/treasure-map-so-many-eyes
https://www.wowhead.com/mission=2113/treasure-map-mysteries-of-the-reef
https://www.wowhead.com/mission=2115/treasure-map-under-the-ruins
https://www.wowhead.com/mission=2116/treasure-map-slog-in-the-mire
https://www.wowhead.com/mission=2114/treasure-map-wild-ride
https://www.wowhead.com/mission=2117/treasure-map-chain-of-events
https://www.wowhead.com/mission=2118/treasure-map-no-haven
https://www.wowhead.com/mission=2119/treasure-map-giants-treasure

each mission has its own loot table

a few examples getting a pet and a mount from follower table

yes, the missions exist, but i'm not sure if "each mission has its own loot table" is necessarily helpful in this instance -- if you look at this one, for example, scroll to the rewards and you'll see a thing at the bottom that asks you to expand the selection ("show 131 more"):

this displays the possible mission rewards as basically the entirety of the island drop table, and every single one of the missions you linked is the same way, with incremental/negligible differences. each mission can also reward gold OR azerite OR residuum. island loot is already duplicated on the island maps + the cache vendor, so we really don't want to duplicate them another time on something that is not a reliable way to actually collect the items -- in my experience, i do islands on multiple characters almost every week, and i can count the number of times i've gotten a pet/item from a mission on one hand; it seems weighted to give gold/azerite/residuum much more often. if we added the entire island drop table to every mission, (1) crieve would yell at us and (2) we would get a toooooooooon of complaints from users.