Hi Patrick,
First of all, thank you for all your work on Affinity Photo! It's real pleasure working with it and I absolutely love it!
However, I'm using v1.6.6 and I can confirm when I develop a raw file (CR2), export it as JPG and then import it in Apple Photos, it still shows the photo as created now, instead of the original date. When I open the exported JPG with Affinity Photo, I can see the original "Date Shot" to be the correct one. Unfortunately, this is not recognised in Apple Photos. Please, this is essential for me as well, and I want to continue using your product, because I said - I absolutely love it!
Thanks,
Nasko