HASSOS installed on Hyper-V is out of space

I am getting the following message:

The default disk size is 6GB for the HASSOS VM on Hyper-V yet most people recommend a minimum of 32GB for the RPi.

I have increased the VHDX disk size but HASSOS has not been able to automatically use it as stated in the documentation.

“…If you are running Home Assistant as a VM, look at the documentation for your hypervisor on how to expand disks for virtual machines. Home Assistant will auto-expand to use the newly added space…”

disk partitions

fdisk -l does not do anything!

What can I do?

Thanks in advance for your help!