Hardware fall-over after master gateway goes down - but WAN-interface stays up

[MagnaXD]

As topic says. I currently have a setup where we have 2 internet upstreams with VRRP redundancy from our ISP.  Right-now we have 2 OPNSense boxes who are also redundantly configured with CARP and High-Availability.

The 2 OPNSense-boxes have their WAN-ports connected to a single switch which is connected to the 2 uplinks of the ISP. This works, whenever 1 link goes down (either on the fiber or the Ethernet-side) the ISP switches to the secondary link and whenever I pull out a OPNSense-box the CARP/HA makes the switch seamless from my LAN-point-of-view.

To me it seems the switch now has become a single point of failure. Whenever the switch connected to both ISP-uplinks dies, the entire setup dies. Is it possible in the 'default' OPNSense-box to trigger a HA-fallover whenever the master has a gateway which goes 'down'/'offline' ? Or is HA-Fallover only happening when one of the ports 'physically' goes down ?
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[nzkiwi68]

I would replace that single switch with a switch stack.
Then, with careful plugging in across the switch stack, everything will be fully redundant.