Missing Option to Modify Boot Entries/Order running OpenHCL on Hyper-V

[excelsi]

When i run a OpenHCL VM on Hpyer-V i have no Option to modify the Boot Entries/Order in Hpyer-V MMC/Powershell:

With Powershell the Set-VMFirmware Cmdlet with the Boot Option Values also dont modify anything on the Boot Order/Entries:

Would be nice to have a way to modify it. Thanks!