What were you trying to do that didn't work?

 
[root@opr-k8s-1-worker-0 centos]# echo 0 > /sys/bus/pci/devices/0000\:15\:00.0/sriov_numvfs 
[root@opr-k8s-1-worker-0 centos]# crictl pull ghcr.io/k8snetworkplumbingwg/sriov-network-device-plugin
Image is up to date for ghcr.io/k8snetworkplumbingwg/sriov-network-device-plugin@sha256:016005b36db01a8a0f56100d6dab62ee7ef7bb943b1ec3028165985b1cd090ec
[root@opr-k8s-1-worker-0 centos]# echo 5 > /sys/bus/pci/devices/0000\:15\:00.0/sriov_numvfs 
[root@opr-k8s-1-worker-0 centos]# 
[root@opr-k8s-1-worker-0 centos]# crictl pull ghcr.io/k8snetworkplumbingwg/sriov-network-device-plugin
E0124 11:09:20.702936   33208 remote_image.go:171] "PullImage from image service failed" err="rpc error: code = Unknown desc = pinging container registry ghcr.io: Get \"https://ghcr.io/v2/\": dial tcp 140.82.113.34:443: i/o timeout" image="ghcr.io/k8snetworkplumbingwg/sriov-network-device-plugin"FATA[0060] pulling image: rpc error: code = Unknown desc = pinging container registry ghcr.io: Get "https://ghcr.io/v2/": dial tcp 140.82.113.34:443: i/o timeout

Instead of crictl pull you can just try to access and HTTP/https web server

To workaround this issue I disable the offloading and that makes the VM network working again

ethtool --offload eth1 rx off tx off
ethtool -K eth1 gso off