It's possible to determine two BUs as Global Unit?

Our group have two different companies in the same cloud environment.

2 Companies (A and B)

Company A (15 BUs)

Company B (10 BUs)

The companies needs to manage their clauses libraries separately. To meet this need, we created two contracts organizations through the "Manage Internal Resource Organizations" setup.

Both would like to use the Global Business Unit option, existing in the "Specify Supplier Contract Management Business Function Properties" setup, so that the clauses can be adopted in the other Business Units. But this function is only available for a single BU. In this case, one of the companies would be without the option to adopt the clauses and would have to create the same clause several times in all BU belonging to that company.