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 😁
These things can be pretty hard to hit sometimes, but if you have a tribe, you can do this: Have one of your tribe mates pick it up with an argentavis or any other flying animal that can pick it up, and then start shooting tranqs at it. I’m not sure if this is supposed to happen, but it never attacked the argy my friend was riding as long as they were staying still. And if you have at least one more tribemate, get them to kill any aggressive animal in the area to ensure that the daeodon won’t get killed while it’s knocked (I recommend you do this far away from its pack)