I have written a POS UI extension with the target “pos.purchase.post.action.render” and my code is running at checkout.
My goal was to update some of the checked-out order’s metafields based on some data gathered earlier in the extension. I have tried GraphQL and “useApplyMetafieldsChange” hook and a few other ideas with no luck.
Do I need to have a backend app for this to work? Or can I (or maybe coming soon?) accomplish this from the extension running on the client?