HI
Does Group Name supports an environment variable?
If Yes.. how can i use it? My code doesnt work.

HI
Does Group Name supports an environment variable?
If Yes.. how can i use it? My code doesnt work.

As with all node properties, unless it uses our TypedInput widget and explicitly supports the 'env' type, then your only option is to set the entire field with an env var "${NODE_ID}". You cannot use it to insert env vars into the middle of the value.
Dashboard nodes in general do not play nice with subflows as there is no way to do layout.
In short, dont put dashboard nodes in a subflow