Required when used with Conditional Fields

This will never work I think because the paragraphs widget do nothing, it just render the entity form standard. widget pargraphs table rewrite all html field into a table, codtional field based on field selector to hide or show, DOM is changed. why don't you write a small js script in your form, it's faster than waiting support :)

I would like to learn and see an example.

Can you be so kind and provide any example I am using also Asset Injector module so I can put the code right there but if you can help me with some example I can adjust it to my needs.

Thank you

Finally. Pasting code if anyone else would need the same.

Here is my code, the first function triggers red *
and the second one alert that field is empty.

(function ($) {
  Drupal.behaviors.markFieldRequired = {
    attach: function(context, settings) {
      console.log("JavaScript code is loaded");
      var fieldName = "edit-field-mandatory-0-value";
      console.log("fieldName:", fieldName);
      
      $("input[name='" + fieldName + "']", context).attr("required", "required");
      $("label[for='" + fieldName + "']", context).append("<span class='form-required' title='This field is required.'>*</span>");
      
        }
  };
})(jQuery);

(function($) {
  $(document).ready(function() {
    $('#edit-submit').click(function(event) {
      // Get the value of the field.
      var field_value = $('#edit-field-mandatory-0-value').val();

      // Check if the field is empty.
      if (field_value === '') {
        // If the field is empty, prevent the form from being submitted.
        event.preventDefault();
        alert('Please fill in the mandatory field called "Mandalorian".');
      }
    });
  });
})(jQuery);