Hi Spirit,
I have also tried below on the vm but no luck, still no traffic on any qinq vlans only on untagged vlan1
root@pve00:~# qm set 21001 --net2 virtio=52:54:00:25:ED:50,bridge=brol4057,trunks='2-4094'
update VM 21001: -net2 virtio=52:54:00:25:ED:50,bridge=brol4057,trunks=2-4094...