Multiple WAN IPs but on Different Subnets also using HAProxy on appliance

[sizzling~snitch]

Hello again friends!
Have a client this time that got some new WAN IP's from their ISP but they are on different subnets from the original 2 IPs.

For the first setup and 2nd IP I was able to just add in a VirtualIP and it seemed to be A-OK, thinking this might be because both are on same subnet.

Tried that with new IPs and no go. Even tried setting a gateway on the VirtualIP, and creating new gateways in OPNSense for the new IPs gateway ISP gave us.

Also they have setup HAProxy to route HTTPs  traffic to different hosts in their office, if that matters any.

I have checked filterlogs and never see the new IP show up when I try to hit it from another device on different network/isp.

Anyone come across this of have ideas for me to try?