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What happened
According to the Shopify Developer Changelog, apps can subscribe to events for Metaobject, MetafieldDefinition, MetaobjectDefinition, and InventoryTransfer.
Apps can also target specific metafield changes on InventoryTransfer, rather than subscribing only to broader inventory-transfer updates.
The supplied example uses a Shopify Events trigger for a Metaobject title-field change, then queries the changed resource using identifiers supplied by the trigger.
Shopify states that Events remain available in the unstable API version during developer preview; topics not yet supported should continue using webhooks.
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