KDE@snapcraft: https://snapcraft.io/publisher/kde, https://snapcraft.io/search?q=KDE
https://jriddell.org/2019/04/23/kdes-snap-packages/
https://snapcraft.io/labplot is already available. Latest version: 2.6.0 :-(
2.8.1 is in unstable: https://invent.kde.org/neon/extras/labplot/-/blob/Neon/unstable/snapcraft.yaml
Binary Factory is not yet able to build Snaps. Check out again in 2021.
Docs:
* Jonathan Riddell's Talk: https://docs.google.com/presentation/d/13KVisXrlsrDXzqpr5G2llD33K7yGBwXE2DxByrbFzXM/edit?usp=sharing
* https://community.kde.org/Guidelines_and_HOWTOs/Snap