I teach my kids (daycare kids too) to wipe their own butts from day one of pottying, but I "check" them after pooping, to make sure they are actually clean. I praise them when I wipe clean and let them know when there's still poop. I give them freedom to be by themselves once they are proficient pottiers, open door, nearby but out of sight, verbally checking in and reminding them of the next step (How you doing? Are you done? Did you go poop or just pee? Ok, wipe front first, then in back and I'll come check you butt in a second.)
My 4 year old has been an excellent wiper since before her 3rd birthday. My 2 year old is just starting, but he's already pretty good at actually getting himself clean.
Give her a bit of freedom, let het do it herself and then just check her with a wipe of your own. She'll be empowered and feel more independent and you'll still get the chance to make sure she's clean.