KDE: how to get rid of IBus sys tray icon and keep Zoom

This is a variant of [this question](https://unix.stackexchange.com/questions/529822/kde-how-to-get-rid-of-ibus-keyboard-selector) . But the provided answers either don't seem to work or would entail not being able to have Zoom (cf below). Situation: - I run Kubuntu 21.04 with KDE Plasma 5.21.4 - Zoom requires IBus. I have Zoom and I need it. - IBus has by default an icon on the system tray in addition to the default keyboard selector How can I get rid of the IBus keyboard selector (the ugly leftmost one) in the system tray ? What I have tried: - Uninstalling IBus means uninstalling Zoom ; not an option - Start-up script to kill IBus (`ibus exit`) => no sys tray icon but keyboard doesn't work in certain apps - Uncheck "Show icon in sys tray" in IBus Preferences => IBus still appears in system tray even after reboot even though box remains unchecked - Do the same with `dconf` from the command line => IBus still ignores the config option - Start-up script to restart IBus without panel (`ibus-daemon -rd --panel=disable) => no sys tray icon and IBus is running (ibus-daemon` says something about an existing instance) but the dead keys of my French keyboard ("circumflex + e" displays "e" instead of "ê") don't work anymore. - Tried to hide the IBus sys tray icon in the System Tray Configuration Menu but the drop-down for display options is grayed out: