How to reset/clear Custom Code selected Values

Hello.
I have a Form in FF that I use Multiple Custom Textfields / Dropdowns.
I need to be able to clear some fields on certain change conditions or on form submission.
On regular flutter-flow fields, there is an option (in the action menu) to reset or clear the field state.
But there is no way to clear or reset the fields to their initial state on the custom form dropdown and the custom text field

Anyone can advise me how to make it work?

Thanks