from your post it is not clear how this is related to Palo Alto, however Wireshark is supporting GENEVE ever since version 2.0.0. The dissector is using default port UDP 6081. If you expand packet details, you should see details of encapsulated frame/packet.
I am guessing @Sephora_IT question is related to the GENEVE encapsulation between GWLBe (endpoint) in AWS and VM-Series firewall.
Unfortunately I don't believe it is possible to capture GENEVE encapsulation with packet capture on the firewall...Not sure if enabling "pre-parse match" could help, but it should be used only with low volume of traffic
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