Windows Server installation template - partitioning problem

Hello,
I've got RISE-1 dedicated server with Windows Server 2019 licence from OVH. Problem is, even if set multiple partitions (ovh built-in template - full GUI (not CORE or HYPER-V)), system is installed with only 1 partition on whole available disk space. In my case this is 2x450gb nvme soft raid. Already tried primary c: raid1 220GB + logical d: raid1 200GB and primary c: + primary d: In both cases after logon to freshly installed system I have only c: with 420GB. What I'm doing wrong or any advise how can I change this after installation? Already tried diskpart shrink but it's not working with dynamic volumes. Also don't want to spend money on 3-rd party solutions. Thanks.