yeah u can install from file, store.kde.org wont help if the package never shipped the plasmoid tho
grab icontasks from the plasma-desktop tree:
-plasma-desktop/applets/icontasks at master · KDE/plasma-desktop · GitHub
-download the folder (Code → Download ZIP, then pull applets/icontasks out)
-mkdir -p ~/.local/share/plasma/plasmoids
-cp -a icontasks ~/.local/share/plasma/plasmoids/org.kde.plasma.icontasks
-ls ~/.local/share/plasma/plasmoids/org.kde.plasma.icontasks/metadata.json
-plasmashell --replace &
then Add Widgets → search icons-only
if metadata.json is missing from that zip path ur on the wrong folder. apt-cache search icontasks being empty on resolute is a packaging hole, worth a kubuntu bug too
At this point, I think your best bet is reinstalling the OS and taking it as a learning experience: don’t randomly delete system files in an attempt to fix problems. It will only cause new ones!
You might also try using a distro that includes some kind of built-in system rollback functionality, which makes it really easy to recover from an issue like this.
Unless the rest of your system is also running git master versions of everything, you’ve just put a potential binary incompatibility time bomb on your system, because the Task Manager you’ve just manually installed is not guaranteed to be compatible with the system-installed Plasma. So it may work for a while and then stop working. Or random parts of it may not work.
And because you put it in ~/.local/share/plasma/plasmoids, it will continue to override the system-installed version of the Task Manager once your package manager gets you the correct version, drifting ever farther out of sync with the rest of Plasma.
I recommend removing ~/.local/share/plasma/plasmoids/org.kde.plasma.icontasks either now, or else the moment you get a system upgrade that includes a new version of Plasma.
for posterity, i want to mention that i did take your advice and removed the manually added plasmoid, When i saw that a new plasma update comes with a kubuntu upgrade 26.10 . After upgrading my kubuntu, plasma got updated to 6.7 and the icons-only widget returned officially.