The problem: I was trying out the post-purchase extension using Shopify tutorials and Shopify CLI, but it didn’t show up in any way. Everything was done according to tutorials.
The solution: I was submitting $0 value orders (items in the cart were with $0 price). That’s why it hasn’t shown up.
Question to Shopify team: Is it supposed to work like this? Maybe we can fix it?
Thank you.