Both don’t ship with their own Wayland compositor, but there are enough to choose from.
Xfce comes with a wayland session using labwc out of the box, but was also tested with Wayfire. The devs state you shouldn’t hold your breath waiting for the native window manager xfwm to be ported into a Wayland compositor, since they don’t know if/when it will be done. Almost all other Xfce components support Wayland now, while retaining X11 compatibility.
LXQt’s newest stable release has full Wayland support, with 7 different Wayland compositors to choose from within a GUI settings menu: Labwc, KWin, Wayfire, Hyprland, Sway, River and Niri
https://xfce.org/about/news/?post=1734220800
https://lxqt-project.org/release/2024/11/05/release-lxqt-2-1-0/
For what it’s worth, they have experimental Wayland support. It’s an important distinction. For example, Cinnamon has experimental Wayland support IIRC and last time I tried setting up a lock screen on my ThinkPad (you know, for security purposes, since it’s a laptop and all) I wasn’t able to get one working.
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Fedora, so most Gnome based distros. KDE as commented beside me. Arch-based EndeavourOS.
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KDE Neon and kubuntu have Wayland as default. Just was trying them because I wanted Plasma 6. Took a bit of tweaking for a few things but I have all the things I need running fine with Wayland.
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