Run Flow workflows from the Admin using “Automate with Flow” links
We've just released the ability to run Flow automations directly from the Shopify Admin. Workflows can be run manually from the Shopify admin on individual orders, draft orders, customers, or products. You can also run a workflow manually on several orders, draft orders, customers, or products at the same time with a bulk action. Running a workflow manually allows it to be used even if the event that triggers the workflow has already occurred.
For more information on how it works, check out the Shopify Help Center.