Some experiences with node-red snap?

I‘ve tried node-red snap and I wasn‘t able to install additional nodes and I didn‘t find a way to manage my configuration and flows between different snap starts.

Does anyone have some experiences with the node-red snap? How can I add/install addiotional nodes to this snap? How can I save my configuration or flow so that the snap starts with the exact same configuration/flow after a reboot for example?

Thanks in advance!

It works for me, as long as I start node-red as a service using snap. This creates local data in /root/snap/node-red.