/usr/share/plasma/ is in plasma-pa 4:5.12.4-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/plasma/plasmoids/
/usr/share/plasma/plasmoids/org.kde.plasma.volume/
/usr/share/plasma/plasmoids/org.kde.plasma.volume/contents/
/usr/share/plasma/plasmoids/org.kde.plasma.volume/contents/code/
/usr/share/plasma/plasmoids/org.kde.plasma.volume/contents/code/icon.js
/usr/share/plasma/plasmoids/org.kde.plasma.volume/contents/config/
/usr/share/plasma/plasmoids/org.kde.plasma.volume/contents/config/config.qml
/usr/share/plasma/plasmoids/org.kde.plasma.volume/contents/config/main.xml
/usr/share/plasma/plasmoids/org.kde.plasma.volume/contents/ui/
/usr/share/plasma/plasmoids/org.kde.plasma.volume/contents/ui/ConfigGeneral.qml
/usr/share/plasma/plasmoids/org.kde.plasma.volume/contents/ui/DeviceListItem.qml
/usr/share/plasma/plasmoids/org.kde.plasma.volume/contents/ui/Header.qml
/usr/share/plasma/plasmoids/org.kde.plasma.volume/contents/ui/ListItemBase.qml
/usr/share/plasma/plasmoids/org.kde.plasma.volume/contents/ui/SmallToolButton.qml
/usr/share/plasma/plasmoids/org.kde.plasma.volume/contents/ui/StreamListItem.qml
/usr/share/plasma/plasmoids/org.kde.plasma.volume/contents/ui/main.qml
/usr/share/plasma/plasmoids/org.kde.plasma.volume/metadata.desktop
/usr/share/plasma/plasmoids/org.kde.plasma.volume/metadata.json