this dome is compatible from the gopro 9 to the gopro 11, so I think the gopro 12 will be too.

It should work for both Hero 9 and Hero 10 when you look on the Official Producz Page of Polar Pro (https://www.polarprofilters.com/products/gopro-hero9-dome)

Only fits with the GoPro 9.

The best thing to do is to contact our customer service directly at https://helpcenter.digitec.ch/hc/de/requests/new. Your request can then be examined individually.