I’ve used Termux with proot-distro to install Debian with xfce4 on my Android phone.
I can use it on a monitor with a usb-c to hdmi cable, or just vnc into it from a PC, or use the phone itself with RVNC to have a desktop “in hands”.
Sensor data is sadly not working properly, so no CPU usage and temperatures are a bit off as well.
XFCE really is it isn’t it? I first tried it when I got my CDs in the mail for Mandrake/Mandriva Linux back in 2002 or so and am still using it today!
Hoping for Wayland support soon