Looking at the REST API and the GraphQL API there doesn't seem to be a cut and dried way to pull this, as its own discrete property. Perhaps by reviewing order status, payment details, etc. through a series of API calls.
Depending on what you are looking to do, perhaps subscribing the the Shopify orders/paid webhook would work? https://help.shopify.com/en/manual/orders/notifications/webhooks
Then once the event triggers a webhook request, you can handle the event by reviewing the data and doing what you need to do?