In order to create VRRP for the Warp links, a regular interface must exist. To maintain the topology, you can create a "dummy" circuit that will act as a regular interface:
Define an internal "loopback" circuit together with a VRRP virtual router at the XOS level.
Add this circuit as a regular interface in the Virtual System topology (with a unique IP address/netmask).
Here is an example XOS 8.x configuration of a loopback circuit with a VRRP template:
vrrp failover-group vsx_fg failover-group-id 1
virtual-router vrrp-id 11 circuit Loc1
At this point, when XOS configures circuits for the Warp links and checks whether VRRP is configured on any circuit attached to this Virtual System, it finds the loopback circuit and configures VRRP for the Warp circuits too.
Since XOS 9.5, the link-state-resistant command replaces the internal command to
keep a circuit in an Up state regardless of the state of the physical interface to which it is assigned.