How to Hide Product variations which are out of stock

I have shoes website where I have few product variations size:36-41. Each size has few products in stock. Is there a way to hide the variations that go out of stock in the drop-down list from front-end? Click and check the screenshot There only 39 size has 1 product in stock others should be removed from the frontend because they haven’t any product in stock of these sizes[red marked].
Thanks

check the screenshot:
1. Dashboard: https://prnt.sc/qx8jsu
2. Front End: https://prnt.sc/qx8k6d
3. Related URL: https://github.com/woocommerce/woocommerce/issues/15484

• This topic was modified 4 years, 9 months ago by Khandaker Mahfuz Hasan.
• This topic was modified 4 years, 9 months ago by Khandaker Mahfuz Hasan.
• This topic was modified 4 years, 9 months ago by Khandaker Mahfuz Hasan.

The page I need help with: [log in to see the link]