The pool itself is open, however the slide is still closed. From photos, the clown has been removed - what exactly is going in its place remains a mystery.
Per the WDW website: Luna Park Pool at Disney’s BoardWalk Resort may look a little funny as work takes place on the Keister Coaster waterslide. We expect the waterslide to be available again before the end of 2020—though dates are subject to change. Work in the pool area will continue through the end of this year. Luna Park Pool, as well as 2 leisure pools at this Resort hotel, will remain open during this refurbishment.
Here now.. the pool is pretty much exactly the same. The only thing is the clown is gone, but whatever will be in its place, is still under wraps. And the slide is currently closed.