Create dummy instances of custom entity with dummy field data?
My created entities were not listed by the EntityFieldQuery above because of this issue: Make EntityFieldQuery::fieldOrderBy include NULL field values

My new entities did not include a date field that was used to sort the table. So, the table didn't include the null-field entries.

I didn't figure out how to specify the bundle for my new entities but there is only one bundle defined, so it is the default. I'm still interested in a function that would be able to create random field data valid for each type of field. Heading over to look at Devel module for that function.