FW rules on VLAN not working but DHCP works

[ghostactual]

Setup: In OPNSense 24.1 I have created a VLAN called GUEST, VLAN tag 200, with DHCP enabled. In Proxmox I have created a VM tagged with the VLAN ID 200. The VM gets issued an IP address from DHCP and I can see it in the leases.

Problem: No matter what FW rule is created I cannot get any traffic to flow in or out of the VM.

I've tried restarting the FW, created another new VLAN and it always ends with the same situation. Nothing in or out except for getting issued an IP via DHCP.
 
For context, I have another VLAN for a Wireguard VPN and the rules work as expected. Devices on that VLAN can talk to everything on my network as intended.

Seemingly identical issue to this post, https://forum.opnsense.org/index.php?topic=37477.0 but it went nowhere so making a new topic.