Hi,
there is a website of some handy guy who managed to overcome Synology's counter measures to run VDSM under third party hypervisor.
It appears that VDSM is easier to run than the actual DSM and you don't need loader.
Link: https://jxcn.org/2022/04/vdsm-first-try/
Apparently VDSM communicates with the hypervisor via serial interface and that hypervisor provides the information to that virtual machine about the license. And it seems to be all there is to it.