Bent wheel cover maybe?
You mean wing gear door? Looks like there could have been a problem in the sequencing here. Who knows why. Many different things can go wrong in the gear/gear door extension retraction systems on a 747.
Or if the wing gear door was damaged prior to gear extension (as seen in this pic) then that would have stopped the wing gear from extending (although unlikely).
Yes, that gear door looks stuffed alright and appears to have contacted the wheel. Or the wheel has hit it on extension for whatever reason.