Tire flank damaged?

Good day, I drove by car about 2 weeks ago at parking unfavorably with a tire along a curb / on the curb. Affected is one of the rear tires. It squeaked. The curb was not particularly high, perhaps more 5cm than 10cm and also not “sharp” but rounded. Besides, I was of course on the road with very low “creep speed”. I took photos of the tire directly afterwards, in the annex there are three photos. The “discoloration” or the slips on the tire, as shown in the photos, are as far as I can see, so that was probably rather superficial in the road dust on the tires. It is still the winter tires. Now I would like to have the wheels changed in a workshop next week and will also ask if one could look at the affected tires. I would be grateful if we could check out the tyre. I would also like to know in advance: what can a workshop actually do in such a case to check if there is any damage? Since the winter tyres should actually remain for storage on the rim, one cannot actually examine the tyres from the inside. I am grateful for all the tips and hints! Stephan M.