For Joomla 4 we are converting all of our themes to a more modern framework, including Uikit 3 modules, Bootstrap 4 and many Uikit extensions such as Accordion, Slideshow, Portfolio etc.
As soon as Joomla 4 is officially released, you will be able to download our themes here. Until then you can get an insight into our previous Joomla 4 templates under the following links.
If you are interested in testing a Joomla 4 template, please send us a Mail.
If you want to create a website with Joomla at this point in time, please do so with Joomla 3.9.x. Joomla 3 is very stable and runs on the latest PHP 7.3 version. If you are thinking of using Joomla 4 within the next few years, then you should "clone" your Joomla 3 site and migrate to Joomla 4 and test all extensions extensively. A live update is by no means recommended!