Does this bracket sit behind the bumper cover or between the cover and fascia?

This mounts at the structural frame points behind the bumper cover, serving as the reinforcement member that holds the cover in place. Install order is cover first, then bracket fastens through the back side.

Will this work if my bumper cover has small damage or cracks?

The bracket supports and aligns the cover, but won't repair existing cracks or impact damage. Address cover damage before installation for best appearance and seal integrity.

Do I need to remove the lower valance or air dam to access the mounting points?

Mounting method not explicitly detailed — expect to remove or pull back the lower valance/splitter to access fasteners. Test-fit before committing to the final assembly sequence.