It does look like all the required information is avaliable to create a checker for the three challenges (the two you mention plus GC3Q86T).
The all in challenge should work with one of the existing checkers since it just requires one log in each region (+ joker countries).
The two elevation challenges do require some more work but they do not look too complicated.
If no one else pick this up I can have a look this weekend.
If you know more similar challenges you are welcome to add them in the comments.