Hello,
While ACFE Form is quite similar to ACF Form in some ways, it differ from it when it comes to Form Render and Actions. In fact, there no such thing as “post_title => true” in ACFE Form logic. As you guessed it, you’ll have to use an ACF field from the mapped field group to achieve it.
The advantage of this method is that you can use the field of your choice (select, text, textarea…), customize its behavior, and place it where you want in the form (which is not possible in ACF Form).
Regarding the fields render, you can then choose to display or hide it in the back-end (if you decide to use the same field group in the admin), using the Advanced Settings feature, Field Visibility settings or with custom code.
As a side note you also have more advanced settings for the general form render, as you can completely rewrite it with the “HTML > Override Form Render” feature.
Hope it helps!
Regards.