I’ve just updated my iPhone 12 and iPad Pro 2020 to iOS/iPadOS 17, and happy to say that this annoying dialogue has now gone, and edited images in Raw Power are saved to the Photos Library immediately on clicking Done, or the next image in the thumbnail strip.
Cheers
(PS: RP seem to be running well so far now Nik. The odd slow down during editing which was there before, but I think you expected a performance hit anyway, but it’s not been crashing. Thanks.)