Port forwarding for a Vesper Cortex

I have BR1 Pro 5G. I would like to set up inbound port forwarding to the IP address for a Vesper Cortex. I currently use only WiFi connections to the BR1

Do I need to assign a static IP address to the Cortex? If so, how?

How would I identify the IP address currently assigned to the Vesper Cortex? Can port forwarding be set up to operate with dynamic IP addresses?

I am not proficient with routers and this particular router is on a boat with few devices attached.