Right now it's not packaged up for easy use but KDE has supported Raspberry Pi's for ages so I wouldn't be surprised if you ran Plasma desktop, it'd be simple to build and install. I'd wait until they got it back onto the KDE release cadence with everything else though for simplicity
For anyone who wants to test this out, you can do as Devin did by installing Plasma Bigscreen on a Raspberry Pi using postmarketOS, though you would have to compile it yourself or pull from the nightly repos to get the latest changes.
It'll be a slow grind. I view. Linux today similar to Macs in like 2003. Low single digit market share but increasing adoption. What doesn't match is the lack of a huge company pushing out flagship advertised laptops/desktops with them that tie in to a very popular device like iPods. But today there's so many more computers being used that a low single digit market share today is probably way more people than Macs back in 2003. And Linux gaming today is better than gaming on MacOS has ever been. Today MacOS is like 15%