Nope i dont think you'll have any problem with that one buddy.
Most mot testers are pretty sound & things like noisy cans....tiny number plates etc will still often pass.
I would doubt that the reflector is even mandatory...probably just the plate with correct sized letters.
My last mot my number plate and exhaust (without the noise baffle in) both passed...but it failed on excess play in the swinging arm..rocking bike left and right you could see the excess play.
You just dont know til you get it in there.
On basis of how mint the bike looks i think it'll pass but just make sure all the basics are working...indicators, lights, horn, cut off switch & crack on.