Is this a possible idea?

I wasn't sure where to ask about this idea

I've got a pair of shoes, they're a t bar style but as they're kids they've got a hole butterfly thing in the front.
(I literally couldn't find anywhere else that sells that style)

On a kid it looks fine but on an adult,eh?

Is there a way to fill it in with putty or something..?

Or can a cobbler help?

Edit: What doesn't help is they made them "adult" shape/width so it looks even weirder. (I have feet shaped feet..)