Purchase Contract with item category item unknown

Dear Experts,

Customer person request to make Purchase Contract with Quantity Contract. The contented is they cannot specify the point connected Purchase Contract, they cognize the point erstwhile they make the acquisition bid for the acquisition contract.

We person recovered immoderate articles that we tin usage Item Categories Item Unknown (M) connected Purchase Contract that we tin conscionable specify the worldly group. We already configure it but the point categories inactive not available.

We already tried to usage Item Categories Material Group (W), but they lone supported for Value Contract.

Is determination immoderate solution however to marque Item Categories Item Unknown (M) disposable to usage ? oregon different solution for the issue?

Thankyou!

SAP S/4HANA Cloud Public Edition