Don't bother learning its saddle engram on mobile if your not ready to go in the dungeons. This is because you need to go in a dungeon, look for a daodon to kill thats a high level, take its chip or whatever its called. Finish the dungeon, and revive it at a revival platform or one of the obelisk's to tame it. Same thing for the megatherium. If you just want a daeo in general in ark mobile don't get it.
So super easy way to tame these guys, Hit them once with any kind of fast moving of flying dino and let them use their healing. After the healing aura goes away Ko them. Instatamed since their food meter is fully empty 😁