What I used a VPC in eve-ng for mab_phone. It would at authenticate thru mab into the voice domain, and not acquire an ip address. So you can't verify with ping.
I also used a VPC in eve-ng for the mab_ap. It would at authenticate thru mab and get into the vlan 102 and I could veify with ping, it wouldn't register to the wlc of course
I put mab_phone and mab_pc on the same switch port, using a net in eve-ng. This way I had to use host-mode multi-auth. You can not have a mab and dot1x on the same port in eve-ng.