- Towards your WAN-provider - are all devices connected to the same switch?
Since direct connection as the drawing shows will most likely not work unless you got some L2 going on at your or their end since you got VRRP at play here.
- As troubleshooting set the physical addresses at FW1 and FW2 to the public /27 range on VLAN69. Like x.x.x.97/27 and x.x.x.98/27 or whatever.
Since you use rfc1918 address on the physical interfaces the box wont pick up that you also have a /27 that belongs on VLAN69.
So if changing to public IP at FW1 and FW2 and it now works but you still want to use RFC1918 on the physical interfaces you will need to setup a static route to tell the box that this public /27 range exists on VLAN69.
Not sure how the config for that would be if its possible to do something like “ip route x.x.169.96/27 nexthop vlan69”.