This may be by design, but I've noticed that if I have Radzen generate CRUD pages on a table that relates to child tables via nullable foreign keys ("Enforce foreign key constraint" set to "no" in SQL Server), the child tables are listed in the "Include:" dropdown, but the resulting page does not use the foreign keys to setup dropdowns, etc.
Its easy enough to manually fix the page later, but this does take quiet a bit of extra time.
Thanks,
Stephen