There are definitely Mario clones for iOS and Android. Most of them are terrible because the mobile game market is an unregulated jungle of scum and disease, asset flips, Clash of Clans / Candy Crush clones (but I repeat myself). Good luck finding some good ones, you'll need it.
The 'best' Mario clones on mobile (and by best I mean 'hilariously dumb', so don't think these are good) are the ones that just recolor Mario or remove his mustache or whatever as if that would prevent Nintendo from suing them if they cared to do more than tell Google/Apple 'Hey, this game is literally just ripping off our Mario character, take it down' once in a while.
Aah, the good ol’ days of playing Super Andrio on a Samsung smartphone the size of a match box… A terrible clone that ripped graphics straight from Super Mario World, but hey, it was free and I was blown away by this new era of accessible, touch-based mobile gaming.
What else was there… there was Lep’s World, a platformer where you played as a Leprechaun eating clovers that made you big, collecting coins for your pot o’ gold, and kicking snail shells around. It was decent.
Then there was Banana Kong, a Donkey Kong Country Returns-inspired endless runner. It had animal buddies and I could not put it down for a while. I would actually recommend this one!
… probably doesn’t mean much considering games with such microtransaction models tend to have a low attach rate, meaning Lep’s World’s is unlikely to have brought an amount of money comparable to what nintendo generates from its customers on a regular basis. money speaks!