Our packaging tools report: nothing provides qt6qmlimport(org.kde.alkimia.1) needed by alkimia-8.2.0.x86_64 nothing provides qt6qmlimport(QtQuick.Controls.1) >= 3 needed by alkimia-8.2.0.x86_64 nothing provides qt6qmlimport(QtQuick.Controls.1) >= 4 needed by alkimia-8.2.0.x86_64 nothing provides qt6qmlimport(QtQuick.Dialogs.1) >= 2 needed by alkimia-8.2.0.x86_64 These are QtQuick 1 imports plasma/applets/ForeignCurrencies/contents/ui/config/ConfigGeneral.qml:import QtQuick.Controls 1.3 plasma/applets/ForeignCurrencies/contents/ui/config/ConfigGeneral.qml:import QtQuick.Dialogs 1.2 plasma/applets/ForeignCurrencies/contents/ui/config/ConfigGeneral.qml:import QtQuick.Layouts 1.1 plasma/applets/ForeignCurrencies/contents/ui/Currency.qml:import QtQuick.Controls 1.4 plasma/applets/ForeignCurrencies/contents/ui/Currency.qml:import QtQuick.Layouts 1.2 plasma/applets/ForeignCurrencies/contents/ui/main.qml:import QtQuick.Layouts 1.1 plasma/applets/ForeignCurrencies/contents/ui/Okno.qml:import QtQuick.Layouts 1.2 tests/qmlalkonlinequotetest-qt4.qml:import QtQuick 1.0
It looks like the associated plasmoid needs to be ported to KF6. There are hints at https://develop.kde.org/docs/plasma/widget/porting_kf6.
If it is the alkimia package located at https://build.opensuse.org/package/show/openSUSE:Factory/alkimia, some more details about the cause of the problem can be displayed: $ sudo zypper install alkimia plasma6-sdk $ ln -s /usr/share/plasma ~/.local/share $ plasmawindowed org.wincak.foreigncurrencies26 ... This widget was written for an unkown older version of Plasma and is not compatible with Plasma6.