If you want to watch live traffic in a pod with wireshark…
Then you need to install tshark in your pod and then:
kubectl exec your-PODs-ID -- bash -c "tshark -i eth0 -w - port 80 2>/dev/null" | wireshark -k -i -
Adapt the parameters to your context. Thanks gbi for his Howtoforge article that showed me the way.