Hello, @Yasir Alam 8Theme,
We appreciate your prompt response.
We would like to inform you that within the new Single Product Builder, the addition of the stock status can be achieved by utilizing the Product Stock element: https://prnt.sc/U3DoEMiMdqNt
If you have any additional questions or concerns, please do not hesitate to reach out to us. Our support team is always available to assist you.
Yours sincerely,
The 8Themes Team