Market-driven shipping doesn't currently support sub-region markets at checkout — fix required

[theriptide]

Hi Shopify team,

Market-driven shipping begins rolling out October 1, 2026, and while testing the feature preview, we found a case where the country of a market with shipping enabled isn’t displayed at checkout.

This is the shipping market configuration (please note that I have selected a subset of Spain’s provinces):

As you can see, Spain does not appear at checkout, even though shipping is enabled:

If I select all Spanish provinces, Spain does display at checkout, so it appears to be a bug.

Kind regards,
Patricia

[theriptide]

Hi Shopify team! Any update on this? Shipping to countries where not all provinces are covered is still not showing at checkout.
Thanks!