This is from a UK supplier on ebay but may well be what you need:
Sealey Brake Caliper Socket 14mm Square Ribe 7pt 1/2" Fits VW Audi Q7 S4 etc ... | eBay
This is from a UK supplier on ebay but may well be what you need:I'm stumpted. I've been trying to figure out how to get the calipers off my wife's car for some time to do a pad swap. I can't seem to find the correct tool/socket to do it. I believe the 7 point 14mm bolts on the top and bottom of the caliper are what holds them on. Every search I've been on with Google shows me 14mm 10 points, and 20mm 7 points. I've also searched extensively for directions and can't find a single write-up or video for the 2020+. Any help would be greatly appreciated.