I remember under latter releases of KDE 5 there was an option for live wallpapers, I can’t seem to find the option under KDE Neon 6.1.1 - Am I just missing something or has the option been removed?
Plasma 6, like Plasma 5, features the option to use wallpaper plugins. It ships with several (still image, slideshow, etc), and more are available from 3rd-party sources. Plasma 6 has fewer of those right now because not all the ones that were developed for Plasma 5 have been ported to Plasma 6 yet.