We are getting close - we want to move our own sites over to Joomla 4 and so this is a fairly high priority. EasyLayouts (as you can imagine) interacts with Joomla at a fairly low level and so is considerably more complex to migrate than most Joomla extensions.
I would say we are 85% of the way there. We have a development/test version which a few of our long standing users are testing out and giving us invaluable feedback.
I'm migrating our own production sites to EasyLayouts in Joomla 4 and once I'm happy these are stable and working I'll be happy to release the final stable version. This should be within the next 2 weeks (Covid willing!!).
I am making a pre-release of EasyLayouts for Joomla 4 available in the technical support forum.
demo.easylayouts.net is running this version if you want to take a look - please let me know if you see any problems. The default Cassoipea styling needs a bit of work - uikit is more attractive out of the box than Bootstrap 5 in my opinion.