since the other user with a ryzen 8845hs from same manufacture but different vendor asked their support to and also got the answer that iommu is enabled (and according to fedora on bare matel it is):
i conclude that xen isn able to boot on this processor, maybe as marek pointed out it doesnt read the tables correctly or does get incorrect devices ranges back which it cant handle.
so far i was focused on the processor that i own, but maybe the ryzen ZEN4 plattform isnt yet supported by xen?
i am just widly guessing and cant even figure out in the xen source code if it is generic or somehow identifies the processor/platform. just above my comprehension 
and even if it is a bug, i dont know how to report it and aquire propper logs, all i got is photos from my computer display 