As per my query
I would suggest the ability to link new contact Entity records to existing Account Entity records during a dataflow import.
I understand that this can be accomplished via a manual import from Data Management in the PowerApps Admin Center, however this lacks the Transform and schedule functionality of dataflows.
To expand on this, it would be beneficial to have the ability to import all entities with relations. i.e., Contracts related to Accounts, Contract Lines related to Contracts, etc. The practical use of importing from dataflows is limited without being able to import relations.