How to bring external data from SQL Server tables into your Model-driven Power Apps with the new Virtual Connector Provider. This blog posts demonstrates how you can transparently combine the virtual & physical data onto a single screen for the users to work on.
One-to-one relationships and forms within forms
Splitting data into multiple tables for security purposes and still providing a nice UX to work with business records on a single form. You can achieve both goals with Dataverse and Model-driven Power Apps!
Relational data on Model-driven forms, part 2: Form Component Control
How to make fields from a related table editable on a Power Apps Model-driven app form with the new “forms within forms” PCF control. This second part shows how to go beyond Quick View Forms and create a seamless data entry experience.