Steps to reproduce the issue
I've been reading the documentation page for the com_fields and the issues here but I couldn't find an option to add component specific parameters, as it can be done with com_categories, for example:
/administrator/components/com_mycomponent/models/forms/category.xml
Expected result
To be able to add a XML file with new parameters, for example /administrator/components/com_mycomponent/models/forms/formfields.xml
Additional comments
This will allow third party developers to integrate better with their extensions
For 3.7 it is certainly to late, but i think it is a good idea for further improving com_fields.