Custom field logic and field display logic in Angular

Is there a way to create custom field logic classes in extensions/defaultExt folder and register it in SuiteCRM 8.8? I couldn’t find a registry like BaseFieldRegistry.

Check out this:

  1. How to Register a Custom Field Component (Angular) in SuiteCRM 8?

  2. Suitecrm V8 Fields Custom Validation - #5 by holdusback

  3. SuiteCRM 8 Extensions - #10 by clemente.raposo