Custom Attributes for Input Booleans

Is it possible to create custom attributes for input booleans? I would like to create a secondary name that I can use in some node-red flows.

Nope, input_boolean doesn’t support custom attributes :
https://github.com/home-assistant/home-assistant/blob/2b490e44862ca7daae113fff092202ce9a646823/homeassistant/components/input_boolean/init.py

Sorry know nothing of node red but does it not allow you to use entity_id’s ?