How to Set Up a Virtual IP that is Bind to Both WAN1 and WAN2

Hi,

Does anyone here know how to create a Virtual IP (111.111.111.112) that can be bind to both WAN1 (111.111.111.111) and WAN2 (222.222.222.222)? This way, even if either of my two public IPs goes down, the remote site camera will not experience any downtime.

My goal is to set up my camera to connect to only one public IP, which will be the Virtual IP (111.111.111.112). This way, if either WAN1 or WAN2 goes offline at the head office, the camera will still be able to connect without needing to change its connection settings.

Just for your information, the remote site camera doesn't have the option to create a VPN tunnel due to the absence of a router. They are using mobile SIM-based internet, which only provides basic internet through DHCP. I'm using Sophos XGS 2100 FW at Head Office.

If this is not possible with the Sophos firewall, can I do this with Cloudflare?

Here's the sample diagram: