Does these brakes look normal? Or there's something wrong in the install

[Dream Making]

Since i've bought my Fiesta ST MK7 i always noticed a weird noise coming from the rear left. At first i thought was the rear bearing, but that is unlikely since i've very recently swapped the tires and tires shop said that the bearing was all good. Tonight, while coming home, i've noticed that the "rolling, somehow high pithed" noise increases when i slighlt tap the brakes. I've tried to record a sample of it but is very hard to properly hear, and i, from the driving position, can only hear it when coming next to something that bounce it back like a wall or some other passing cars.

i took a picture of the brake caliper. Is the install correct?
Afaik, those are not the stock disks and the caliper is running on Brembo disk pads

Thanks a lot