custom-callbacks.php

<?php

add_action(
	'elementor/element/jet-blog-smart-listing/section_custom_fields/before_section_end',
	'jet_custom_meta_callbacks'
);

add_action(
	'elementor/element/jet-blog-smart-tiles/section_custom_fields/before_section_end',
	'jet_custom_meta_callbacks'
);

add_action(
	'elementor/element/jet-posts/section_posts_custom_fields/before_section_end',
	'jet_custom_meta_callbacks'
);

function jet_custom_meta_callbacks( $controls_stack ) {

	foreach ( array( 'content_related_meta', 'title_related_meta' ) as $control_id ) {

		$control = $controls_stack->get_controls( $control_id );
		$fields  = $control['fields'];

		$fields[3]['options'] = array_merge(
			$fields[3]['options'],
			array(
				'jet_custom_date' => 'jet_custom_date',
			)
		);

		$controls_stack->update_control( $control_id, array( 'fields' => $fields ) );

	}

}

function jet_custom_date( $value ) {
	return date( get_option( 'date_format' ), $value );
}

add_filter( 'jet-engine/listings/allowed-callbacks', 'jet_add_date_to_dynamic_fields_filters' );

/**
 * Add jet_custom_date callback to JetEngine Dynamic Field filters
 */
function jet_add_date_to_dynamic_fields_filters( $callbacks ) {
	$callbacks['jet_custom_date'] = 'Custom Date Format';
	return $callbacks;
}