Conditional logic is only used in the admin when editing and has not effect on what is shown on the front end. You must code the front end to use it.
example:
if (get_field('true_false_field_name')) {
// show the conditional field
}
This is not something you’re going to be able to do in elementor without creating custom code. More than likely you will need to code a custom shortcode and then use that shortcode in elementor.