1 FB BM ID can be used for multiple WABA accounts, and 1 WABA may host 25 different phone numbers. Learn more . There is no limit currently on how many WABAs can be created for a given FB BM ID. But each WABA should ideally represent a different business. The WhatsApp template message that has been created can be used/shared on each WABA's number. Precisely what it meant was that ideally, 1 WABA should represent the business. If the business is large enough and has multiple business units, they can use the same BMID to create multiple WABA to suit their needs.
How many WhatsApp Business API account can be made with one FB BM ID?