Help with setup of SAP Ariba Buying, Base Edition (Scope Item 4AI)

Hallo Experts,
we person a SAP Public Cloud 3SL System and our extremity is to trial the functionalities of Scope point 4AI, which we thought would beryllium included successful the SAP Public Cloud Edition licence.
During the setup we tried to adhd the requiered settings connected the BTP via the recommended Booster "Ariba Buying" , but this results successful a informing that we miss the entitlements "Name: Guided Buying, Type: Service" and "Name: procurement, Type: Subscribtion".
Can idiosyncratic explicate if this means we request further licensing for those and if truthful for what products/serivces precisely (if imaginable delight supply worldly numbers) ?

Best regards
Lukas