Dear Experts,
I have to create support tickets in the support launchpad for our SAP Hybris Marketing Cloud test tenant.
In the support launchpad I can find the installation number of the yMkt Cloud tenant but I'm not able to create tickets for the installation (I have all needed authorizations).
I've contacted SAP EMEA Support and they said I first have to create a system for the corresponding installation. (usually I think for cloud products this has to be done by SAP and not by the customer!?). I only know this from on-prem systems..
Trying to add the system I have to provide the following information:

Support said I should choose S/4 HANA Cloud, because Hybris Marketing Cloud is not an available product.
I think Database has to be SAP HANA but does anyone know which entry I have to choose for "Operating System"?
These are the available values:

In my opinion it should be MS Windows or Linux. Where can I find that information if it's not provided by SAP?
SAP Support said I have to check that by myself.
Does anybody know where to find that information??
I'm still wondering why these administrative actions haven't been done by SAP. Does anyone else have to do that?
Best regards
Tobias