Hi there!

Thanks for contacting us.

The Helix3 framework got Joomla 4 compatibility recently. This Oneclip template is based on Helix3 framework. But it is better to wait untill the template also get an compatibility update. As you can see compatibility information within the template details that the template is only cmpatible with Joomla 3. No worries, all helix 3 based templates will get updates soon.

Here is the plan: https://www.joomshaper.com/blog/joomshaper-s-plans-for-joomla-4

Best Regards

Thanks, Rashida.

Is there any one page template that is compatible with Joomla 4.x?

You are welcome:)

Not yet. All of them are based on the Helix3 framework as I can see...