The heat shields/dust sheilds could be bent inward and rubbing on your brake rotors. This may not be the case but its worth checking, When I installed my leveling kit on my 2020 Silverado I set the rotors on the ground when I had everything broke loose to get the struts out to install the kit, then when i put everything back together I heard a grinding noise when i was driving at low speeds and I thought for sure I had torn my truck up but I checked the sheilds and they had bent in where I sat the rotor on the ground and I believe i bent them back outward by hand but I may have used a screwdriver, they are just thin metal sheilds and anything could bend them pretty easy. I took the wheel off and just ran my hand around the rotor to find where it was contacting the rotor and causing the noise.