installing over the range microwave uneven wall

Hi group, hope someone can help, I have a new set of cabinets and microwave, unfortunately the cabinets and wall are a bit uneven. The microwave would need to to tilt up 1/4" to be level and be 1/4" away from the wall at the bottom where the bracket goes.

Does anyone know if the bracket has this much play or will I need to shim the bracket away from the wall.

Thank you!