hello.php

<?php
/**
 * Register the widget controls.
 *
 * Adds different input fields to allow the user to change and customize the widget settings.
 *
 * @since 1.0.0
 *
 * @access protected
 */
protected function _register_controls() {
    $this->start_controls_section(
    'addon_text_display',
        [
            'label' => __( 'Tên của section', 'addon_elementor' ),
        ]
    );

    $this->add_control(
        'custom_text',
        [
            'label' => __( 'Custom text', 'addon_elementor' ),
            'type' => Controls_Manager::TEXT,
            'default' => '',
            'placeholder' => __( 'Enter your text', 'addon_elementor' ),
        ]
    );

    $this->end_controls_section();
}