Arm servers do precisely have exactly that set of standards ((U)EFI/ACPI). See Arm SystemReady. You'll notice in the blog linked above that it mentions Arm SystemReady-VE, which uses those standards.
But it would probably be better as a containerized microservice with 100 RPC endpoints. Just think how flexible this would be. Even better, 1000 containerized microservices with failover and autoscaling.