[e12e]

Presumably that would get you the previous release, if running Ubuntu 20.04? You'd either need a custom ppa, build it yourself, or run the early version of 20.10 (oth look at the date, I guess 20.10 is out? So maybe wait for 21.04?).

Ed: not quite yet, October 22nd, apparently : https://wiki.ubuntu.com/Releases

And 20.10 will "only" come with plasma 5.19 - so it's ppa/bacports or 21.04 alpha for 5.20 looks like:

https://wiki.ubuntu.com/GroovyGorilla/Beta/Kubuntu

https://www.omgubuntu.co.uk/2020/09/kde-plasma-5-20-release-...