These are all their variety shows
Wanna One Go (Mnet, 2017)
Wanna City (SBS Mobidic, 2017)
Wanna One Go Season 2: Zero Base (Mnet, 2017)
Wanna One Go in Jeju
Wanna One Go Season 3: X-CON (Mnet, 2018)
Wanna Travel (Olleh TV, 2018)
I don't think the Wanna One Go episodes are long but I kind of stopped after a couple of episodes in S2 so I will need to catch on those. Wanna City wasn't too long either.