PHP 8.2 Deprecation Warnings

I’m currently testing NexGen Gallery 3.5.3 and it now mostly works after patching, but there is still a deprecation warning cropping up a lot under PHP 8.2 through the WP admin dashboard. WP Query Monitor reports it as this:

Creation of dynamic property Imagely\NGG\DataStorage\Manager::$object is deprecated

wp-content/plugins/nextgen-gallery/src/DataStorage/Manager.php:39

Imagely\N\D\Manager->__construct()
wp-content/plugins/nextgen-gallery/src/DataStorage/Manager.php:48
Imagely\N\D\Manager::get_instance()
wp-content/plugins/nextgen-gallery/products/photocrati_nextgen/modules/nextgen_addgallery_page/module.nextgen_addgallery_page.php:98
M_NextGen_AddGallery_Page->register_requirements()
wp-includes/class-wp-hook.php:324
do_action('admin_init')
wp-admin/admin.php:175

In addition, if I go into a gallery, edit a title + description field on an image and then scroll down to click to save the changes. WP Query Monitor records a long list of deprecation warnings:

Deprecated	Creation of dynamic property Imagely\NGG\DataStorage\Manager::$object is deprecated	

    wp-content/plugins/nextgen-gallery/src/DataStorage/Manager.php:39

	1	Plugin: nextgen-gallery
Deprecated	Creation of dynamic property Imagely\NGG\DataTypes\Gallery::$_wpnonce is deprecated	

    wp-content/plugins/nextgen-gallery/src/Legacy/admin/manage.php:862

	1	Plugin: nextgen-gallery
Deprecated	Creation of dynamic property Imagely\NGG\DataTypes\Gallery::$_wp_http_referer is deprecated	

    wp-content/plugins/nextgen-gallery/src/Legacy/admin/manage.php:862

	1	Plugin: nextgen-gallery
Deprecated	Creation of dynamic property Imagely\NGG\DataTypes\Gallery::$nggpage is deprecated	

    wp-content/plugins/nextgen-gallery/src/Legacy/admin/manage.php:862

	1	Plugin: nextgen-gallery
Deprecated	Creation of dynamic property Imagely\NGG\DataTypes\Gallery::$closedpostboxesnonce is deprecated	

    wp-content/plugins/nextgen-gallery/src/Legacy/admin/manage.php:862

	1	Plugin: nextgen-gallery
Deprecated	Creation of dynamic property Imagely\NGG\DataTypes\Gallery::$parent_id is deprecated	

    wp-content/plugins/nextgen-gallery/src/Legacy/admin/manage.php:862

	1	Plugin: nextgen-gallery
Deprecated	Creation of dynamic property Imagely\NGG\DataTypes\Gallery::$post_paged is deprecated	

    wp-content/plugins/nextgen-gallery/src/Legacy/admin/manage.php:862

	1	Plugin: nextgen-gallery
Deprecated	Creation of dynamic property Imagely\NGG\DataTypes\Gallery::$bulkaction is deprecated	

    wp-content/plugins/nextgen-gallery/src/Legacy/admin/manage.php:862

	1	Plugin: nextgen-gallery
Deprecated	Creation of dynamic property Imagely\NGG\DataTypes\Gallery::$images is deprecated	

    wp-content/plugins/nextgen-gallery/src/Legacy/admin/manage.php:862

	1	Plugin: nextgen-gallery
Deprecated	Creation of dynamic property Imagely\NGG\DataTypes\Gallery::$updatepictures is deprecated	

    wp-content/plugins/nextgen-gallery/src/Legacy/admin/manage.php:862

	1	Plugin: nextgen-gallery
Deprecated	preg_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated	

    wp-includes/formatting.php:5725

	22	Plugin: nextgen-gallery
Deprecated	Creation of dynamic property Imagely\NGG\DataTypes\Image::$tags is deprecated	

    wp-content/plugins/nextgen-gallery/src/Legacy/admin/manage.php:982

	21	Plugin: nextgen-gallery
Deprecated	Creation of dynamic property Imagely\NGG\DataTypes\Image::$slug is deprecated	

    wp-content/plugins/nextgen-gallery/src/Legacy/admin/manage.php:982

	1	Plugin: nextgen-gallery

So still a bit of work to be done there. I note the mention of a /Legacy/ folder in many of them, so maybe there’s something I can do or use to avoid this legacy system or gallery UI?