Hey @Evaldas_Raisutis - thanks for the question. We added an updated post here to hopefully bring some clarity: Update: release of the new Shopify Markets and related APIs
To answer your questions directly:
- No, apps are not required to update by October. All apps have the regular API deprecation cycle to update their apps i.e. only when 2025-01 is deprecated is there the requirement to update to 2025-04.
- However, the new version of Markets is only supported on 2025-04 and later. We will not automatically rollout new Markets to stores with apps that use the Markets and/or Catalogs APIs on anything prior to this version. As such, we’re encouraging apps that use these APIs to update to 2025-04 as soon as possible so their merchants can receive the value of the new Markets features.
Note: this only applies to the Markets and Catalogs APIs. Other APIs are unaffected by the new version of Markets.