Adding custom field on view through proper angular frontend method and api calls

I have tried rnd but didnt get any success doing this, can any one help me understand the structure and how i can achieve these below tasks.

  • Dynamic Dropdown Configuration for a Specific Module*
  • Configure a dropdown field in a non-legacy module to populate dynamically using Angular and a custom API entry point.
  • When the module’s page is loaded, the dropdown field should fetch its options from the API and update dynamically.
  • Dynamic Behavior Based on Dropdown Selection
  • Use Angular to listen to changes in the dropdown field.
  • Based on the selected value, dynamically show or hide another field on the same page.