Today, if you are to trigger a custom trigger with entity references from a power automate flow and you're using "unbound action" in power automate, the action does not take a reference (GUID i.e) as input, but rather lists every single column of the entity you want to reefer to as input. For some Dataverse entities, this mean hundreds of columns, and timeouts and failures are likely.

The process would be much smoother if the action could take a given GUID. By using entity references the possibilities for personalization and customizing customer journeys, and the use of cusom triggers with entity references should be easier.