Separate icons theme for Geany (GTK3) in KDE, how?


I have fresh Manjaro stable KDE 5.26.3, kernel 5.15

I’m using icons theme - yellow and orange from kde store.

For GTK apps I’m using Breeze theme – via Kde settings.

Unfortunately Geany (it seems it uses GTK3) has the such icons – I can’t attach screenshot. But icons are extremelly BIG.

I’d like to change icon theme for Geany.

I tried in terminal

GTK_THEME=Breeze geany
GTK_DATA_PREFIX=/usr/share/icons/Adwaita geany
env GTK_THEME=Breeze geany
XDG_DATA_DIRS=/usr/share/icons/Adwaita/index.theme:$XDG_DATA_DIRS geany
XDG_DATA_DIRS=/usr/share/icons/breeze:$XDG_DATA_DIRS geany
G_DATA_DIRS=/usr/share/icons/Adwaita:$XDG_DATA_DIRS geany

it doesn’t work, Geany has the same large icons.

My question is how to force Geany to use another icon theme?

Or how I can fix icons’ size in Geany?