Front apron- kissing floor and TÜV

Hello I want to know if the probability is much higher this is a front apron which is probably a bit lower than the serial bumper kisses the ground if the car is only lowered with springs. e.g. 40mm lower on 17 inch rims. To the next question: If the car has 17 inch rims as written above and is deeper there could be problems with the registration if a part inspection is with the apron? Could be a problem that the car only has springs deep and maybe that’s why(see the question above) touches the ground? Hope you can answer these questions. Greetz at all