Custom payment method for dokan not saving

I am trying to make a custom withdrawal option but I am failed to save the information and retrieved from admin side.

My code works fine to make an extra withdrawal option. When I enter phone number from vendor side the number does not saved. I checked from withdrawal option in admin side but details is blank.

Any help is appreciated.

add_filter( 'dokan_withdraw_methods', 'add_custom_withdraw_methods' );
/**
 * Get default to withdrawing methods
 *
 * @return array
 */
function add_custom_withdraw_methods( $methods ){
	$methods['payment_gateway_id'] = array(
		'title'    =>  __( 'Payment Gateway Name', 'dokan-lite' ),
		'callback' => 'dokan_withdraw_method_dagpay'
	);

	return $methods;
}
/**
 * Callback for Skrill in store settings
 *
 * @global WP_User $current_user
 * @param array $store_settings
 */
function dokan_withdraw_method_dagpay( $store_settings ) {
	global $current_user;

	$phone = isset( $store_settings['payment']['payment_gateway_id']['phone'] ) ? esc_attr( $store_settings['payment']['payment_gateway_id']['phone'] ) : '' ;
	?>
	<div class="dokan-form-group">
		<div class="dokan-w8">
			<div class="dokan-input-group">
				<span class="dokan-input-group-addon"><?php esc_html_e( 'Phone Number', 'dokan-lite' ); ?></span>
				<input value="<?php echo esc_attr( $phone ); ?>" name="settings[payment_gateway_id][phone]" class="dokan-form-control phone" placeholder="+0194397933243" type="text">
			</div>
		</div>
	</div>
	<?php
}

add_action( 'dokan_store_profile_saved', 'save_withdraw_method_dagpay', 10, 2 );
/**
 * Save store settings
 *
 * @return void
 */
function save_withdraw_method_dagpay( $store_id, $dokan_settings ){
	$existing_dokan_settings = get_user_meta( $store_id, 'dokan_profile_settings', true );
	$prev_dokan_settings     = ! empty( $existing_dokan_settings ) ? $existing_dokan_settings : array();
	$post_data               = wp_unslash( $_POST );
	if( wp_verify_nonce( $post_data['_wpnonce'], 'dokan_payment_settings_nonce' ) ){
		if ( isset( $post_data['settings']['payment_gateway_id'] ) ) {
			$dokan_settings['payment']['payment_gateway_id'] = array(
				'phone' => $post_data['settings']['payment_gateway_id']['phone'], // validate phone number here
			);
		}
	}
	$dokan_settings = array_merge( $prev_dokan_settings, $dokan_settings );

	update_user_meta( $store_id, 'dokan_profile_settings', $dokan_settings );
}

add_filter( 'dokan_get_seller_active_withdraw_methods', 'active_payment_methods' );
/**
 * Get active withdraw methods for the seller.
 * @return array
 */
function active_payment_methods( $active_payment_methods ){
	$payment_methods = get_user_meta( dokan_get_current_user_id(), 'dokan_profile_settings' );
	$payment_gateway = isset( $payment_methods[0]['payment']['payment_gateway_id']['phone'] ) && $payment_methods[0]['payment']['payment_gateway_id']['phone']  !== '' ? 'payment_gateway_id' : '';
	if( $payment_gateway !== '' ){
		array_push( $active_payment_methods, 'payment_gateway_id' );
	}

	return $active_payment_methods;
}