Windows 11 version 22H2(OS Build 22621.819)
In taskbar setting CHECK 'Automatically hide the taskbar'.
In WindowBlind Advanced settings UNCHECK 'I would like controls to fade in and out when I move the mouse on and off them'
All the system icons displays but when the taskbar 'HIDES' then redisplays, all the icons are invisible until I mouse over the icons.