JetFormBuilder. Update user meta on the Call a Hook action. Required for the case, when we need refresh user meta on Subscription cycle.

jfb-update-user-meta.php

<?php
/**
 * Key points:
 * - refresh_user_date - hook name for the JetFormBuild Call a Hook action
 * - user_date - meta field we need to update
 * - DAY_IN_SECONDS - subscription cycle
 */
add_action( 'jet-form-builder/custom-action/refresh_user_date', function( $request ) {
	if ( ! empty( $request['user_id'] ) ) {
		$new_exp = time() + DAY_IN_SECONDS;
		update_user_meta( $request['user_id'], 'user_date', $current_exp );
	}
} );