RTFM
https://xcp-ng.org/docs/compute.html#pci-passthrough

You can also passtrough multiple devices. If you wanted to passtrough another device at 00:19.0 just append it to the parameter.

[root@xen ~]# xe vm-param-set other-config:pci=0/0000:04:01.0,0/0000:00:19.0 uuid=<vm uuid>