I made a sale on Shopify and it doesn’t automatically pay printify and finish the order
Shopify doesn’t pay third-party dropshippers.
You would have an option within your Printify account, for how it charges you when orders are placed (https://help.printify.com/hc/en-us/articles/4483644218769-How-do-I-set-up-payments-in-Printify-), as well as automatically fulfilling orders (https://help.printify.com/hc/en-us/articles/4483618218129-What-happens-after-integrating-with-Printify-).
If you’re having troubles with getting this working, then you’d need to reach out to Printify’s support directly for assistance (https://printify.com/contacts/).