Well, as stated by multiple people, any somehow Windows 10 Pro machine will do, as you can just enable Hyper-V and installing a Gen2 VM with OPNSense shows the same issue. While I expect the issue for Gen2 VM's the same as with UEFI enabled bare-metal hardware, I can't of course not sure of that. HAving said that, it's extremely easy to create an environment that manifestates the issue.
So you need a 550 €-NUC with an i5 for testing? Really?