Well I've got no idea since I never got to checkout Sony.Hello siavash! First of all big thanks for such tremendous app, its amazin!
I got a quick question, right now I am using a Xperia 5ii stock rom + rooted, when I try to change statusbar icons (Data and battery), only data but not WIFI icon is changing, does Sony system manages Wifi icon differently?
But anyway, the icons are pictures that happen to have the same name and address as the rom icons. So we force the rom to replace them.
Apparently the WiFi icon in your phone has a different name or address. So your rom receives the icon, but never gets to use it