WSO2 Private CIAM Cloud supports B2B and B2C business models through the B2B organization management feature. Unlike other CIAM products that are limited to simple organization management, the B2B organization management in WSO2 Private CIAM Cloud handles complex nesting, which gives enterprises the flexibility to:

• Define multiple sub-organizations as required to map unique B2B organization hierarchies
• Define fine-grained delegated administration controls to sub-organizations to reduce administrative complexity.
• Create unique security and operational processes within each domain, including login options, strong authentication, and self-service features.

Blogs
https://dewni-matheesha.medium.com/b2b-organization-management-5dc4fb9f5d62

https://wso2.com/blogs/thesource/simplifying-b2b-ciam-using-wso2-identity-server-6/