Form's elements only allow some field type and we need to use all the fields coming from form API.
Create your own plugin of site config.
Use fields with different options (managed file, entity autocomplete, multivalue...)
You will see that the fields do not build completely because the code limits the field's attributes.
Also, the default value is not set, and the response from JSON API does not come correctly.
Adding support to every kind of field.
Fixing the default value's issue.
Fixing JSON API's response based on field type.
Active
1.0
Code
Automatically closed - issue fixed for 2 weeks with no activity.