Hi @Vilmos_Sasdi ,
I wonder whether you coul try this set of icons and tell us the result.
‘GitHub - m4thewz/dracula-icons: Dark icons theme for linux desktops’
Sometimes the set of icons does not bring an icons for each application and you have to copy from others.
You could find a more detailed explanation in the folloing link:
‘ArcoLinux v22.09 | ArcoLinux’
Last, but not least, there is a spin of Manjaro that uses the Korora theme successfully.
‘SbK Manjaro Mate-Compiz 525’
Hope it help,
Regards