There are two alternatives.
ALTERNATIVE - 1
One of the alternative on Raspbian is to use VNC, but this requires GUI which is available on Raspberry Pi OS Desktop, but is NOT available on Piaware SD card image and Raspberry Pi OS LITE. You will have to install the GUI. Please see How-To below:
https://discussions.flightaware.com/t/graph1090-data-vanishes/84614/13
ALTERNATIVE - 2
This alternative does not require GUI and works with Piaware SD card image and Raspberry Pi OS LITE as is. It uses one of the free services listed below. There are many more similar free service, but I am not aware of these
https://www.zerotier.com/
https://www.no-ip.com
https://www.cloudflare.com