Plasma 5.19RC was tested in the kde-next repo the last three weeks (along with Qt 5.15 RCs). With the announcement of Plasma 5.19.0 final/stable, it was moved to all users a few days ago.
Today Frameworks 5.71.0 was also announced and moved along with KDE Apps 20.04.2.
New ISO testing was already started a week ago, so you can see Plasma 5.19 on the latest test ISO. So far not many (new) bugs to report regarding Plasma 5.19, just Octopi-notifier is not always showing in the system tray.
To deal with some (newer) hardware issues reported in these forums, a few new firmwares/modules have been added the last 2 weeks, this include sof-firmware (needed for newer sound-cards, will move to linux-firmware soon according to upstream reports) and two new rtl wifi modules (rtl8723de & rtl8821ce).
Another new added is Photoflare, an app that might be appreciated by those who liked to work with Windows only PhotoFiltre.
Ardour 6.0.0 has moved to a source build, for that aubio was added. You will notice a much smaller Ardour package, since it now uses the system libraries.