Plasma and apps for mobile also getting overhauled for 6.
It’s not only Plasma on the desktop that is getting a new version, as Devin Lin explains in his blog post,
https://espi.dev/posts/2023/12/plasma-mobile-towards-6/
developers are working hard on getting #PlasmaMobile 6 ready for the #megarelease scheduled for February.
I’m not a Linux mobile expert but I think you can get it on a handful of older devices like the OnePlus 6. Limited support sadly since ARM insists on not enforcing UEFI (among other things)