Hello, Logicnet,
I’ve activated the Single Product Builder on your site without any problem.
Because hosting demo did not use the builder, you need to add sections and content from scratch – https://prnt.sc/r-ZvK7WEkkkl
For example – https://prnt.sc/btjwFARILr8l Please check now.
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.
Kind Regards,
8theme team