I just updated the website from Joomla 4.x to Joomla 5.3.3. The last version update (from 3.x to 4.x) was more than complicated, since there was no acceptable layout for the new version. This meant I had to search and test for ages. The current template https://www.joomshaper.com/helix is compatible with Joomla 4.x and 5.x as well as, I believe, 6.x which will be introduced later this year (probably in October 2025).
If you notice that something is not working properly or looking weird - get in touch: