Symptom
It's not possible to assign one business role to multiple business role groups.
When adding the business role which is existing in one business role group in another business role group, the business role is removed from the original one and added to the new one.
Environment
SAP S/4HANA Cloud
Resolution
There is a workaround about it.
1. Copy the business role in app Maintain Business Roles with a different name with the same content(business catalogs and restrictions).
2. Add it to the business role group.
Keywords
business role, business role group, add business role to multiple business role group , KBA , BC-SRV-APS-IAM , Identity and Access Management , Problem