Back In Stock Location-based inventory limitation and feature request

Requesting a native ability to differentiate Back In Stock notifications by Shopify inventory location. Currently, there is no scalable solution for merchants that need location-specific inventory logic. The available workarounds - maintaining separate Klaviyo accounts per store (not feasible with a single Shopify account), building a custom implementation that is complex and prone to breaking, or onboarding a third-party app - which require significant operational overhead. In our case, adopting an app would necessitate a full overhaul of our existing Back In Stock program, including updating flow triggers, revising messaging, and making UI/UX changes to the subscription form. A built-in location-based inventory option would provide a more reliable and maintainable solution.