I'm going to use Shopify SDK in my Unity project but I have the only concern is about support and new Unity versions compatibility since the last update was done in February, almost one year ago.
I see a lot of issues not resolved here and on the Github page.
Can you help me with that and confirm if it's still actual and actively developing?
Yes, this is still supported. We are currently bumping the unity version to 19. Let me know if that will resolve your issue!