Hello,
Navigate to Appearance > Widgets > Add the widgets in the shop page widget area. The Shop page widget area is for the Shop / Product categories pages. WooCommerce filters and Product categories should be added here.
Please follow this guide:
https://xtemos.com/docs-topic/widgets-and-sidebars/
If the issue remains, share the wp login details so I will further check in your site and give you a possible solution.
Best Regards.