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.