Source

File: wp-admin/includes/update.php

function wp_is_auto_update_enabled_for_type( $type ) {
	if ( ! class_exists( 'WP_Automatic_Updater' ) ) {
		require_once ABSPATH . 'wp-admin/includes/class-wp-automatic-updater.php';
	}

	$updater = new WP_Automatic_Updater();
	$enabled = ! $updater->is_disabled();

	switch ( $type ) {
		case 'plugin':
			/**
			 * Filters whether plugins auto-update is enabled.
			 *
			 * @since 5.5.0
			 *
			 * @param bool $enabled True if plugins auto-update is enabled, false otherwise.
			 */
			return apply_filters( 'plugins_auto_update_enabled', $enabled );
		case 'theme':
			/**
			 * Filters whether themes auto-update is enabled.
			 *
			 * @since 5.5.0
			 *
			 * @param bool $enabled True if themes auto-update is enabled, false otherwise.
			 */
			return apply_filters( 'themes_auto_update_enabled', $enabled );
	}

	return false;
}