Not sure what you have done about this since your post.
I backed up into a tree in my yard about 10 years ago and caused similar damage. At the time, I didnt have a rear observation camera, now I do. And the tree is gone.
My dealer pieced in a portion of another ladder they had lying around the shop, I suspect this damage is not uncommon.
The fix is not noticeable and it's completely useable. Cost was about an hour of shop time.
2006 Sunseeker 2860DS Ford V10 5 sp. Torq-Flite w Tow/Haul
Winegard T4 In Motion Satellite Dish
Furion Rear Camera, RecPro 70" Recliners
Mohawk Luxury Vinyl Plank Flooring
2013 AWD Acadia Denali, Blue Ox Equipped