The HP z2 mini g1a supports a BMC module that is a full redfish implementation, so it can do virtualmedia and UEFI configuration read/write.

https://www.hp.com/us-en/shop/pdp/hp-anyware-remote-system-c...

I was pretty disappointed to discover DGX spark has no BMC. I was able to hook it up to pikvm by connecting leads to the power switch wires. It honestly works really well and I can provision it with MAAS

Shout-out to pikvm for their redfish support with the pikvm switch

Great writeup there are quite a few here that are new to me