CDE is included as one of the options in Sparky Linux:
https://sparkylinux.org/cde-common-desktop-environment/
For me, it's a bit broken, though; I can't get the terminal to launch, and without that, you can't do much.
I wrote a comparison of CDE and modern recreation NotSoCDE:
https://www.theregister.com/2022/07/28/battle_of_the_retro_d...
A chap I know led the campaign to open-source it and I wrote about it at the time: