Plasma 5.16.90 was released yesterday, see:
It will be tested the next 3 weeks in the kde-next repo.
As always, place kde-next above all in your pacman.conf. If you do not know how to edit pacman.conf, then please don't try to attempt testing betas of Plasma, editing the pacman.conf is the easiest part of this kind of testing.
Kquickcharts framework should be added as dependency. Without it the notifications plasmoid will not work.
mendez I was looking in the build log for kuserfeedback, saw kquickcharts mentioned as missing optional, didn't register with me that it was new 🙂
Rebuild on it's way.