Can I publish the same flow to multiple WhatsApp numbers?

Each flow (row) on Manage is one definition. You select one connection (WABA) per action in the Publish On Meta column. To use the same flow on another number, you can: (1) Use Update flow on Meta (or Create on Meta) with the other connection selected for that same flow row if your setup supports multiple connections per flow; or (2) Duplicate the flow (export/import), save with a new name, then Create on Meta for the second connection. Behavior may depend on your SMSGatewayCenter configuration.