Add a new interface to a OPNSense VPS without reboot

[fieldengineer]

Hi,
I am running a OPNSense server in a cloud VPS, version:  20.7.8_4-amd64
Could you please advise how to add a new interface to the server without to reboot the system.
For the moment after adding the interface in the hypervisor, the server is not aware of this action till I reboot it.
However a reboot is actually affecting too long running live services.
thx