We need to investigate whether Microsoft supports flat SQL execution anonymously without requiring a DBSet or POCO object. Since it's open source, it is easy for us to investigate this. We could directly get into their source code in the GitHub repository (https://github.com/aspnet/EntityFramework) and investigate whether they have any implementation of the expected behavior.
Microsoft does have a couple of extension methods for a relational database as a façade, which is available at https://github.com/aspnet/EntityFramework/blob/0024373adae7e331ed217de2b4bd12be5eedf925/src/EFCore.Relational/RelationalDatabaseFacadeExtensions.cs.
The extension method located in the preceding GitHub location is ...