EQ in Airplay to WIFI Speakers does Not work.
Using a fully updated iPhone 13 to stream Apple Music into 12 fully updated Sonos speakers through a fully updated Fritzbox 7590 router the phone’s EQ has no effect on the treble, bass or midrange. Streaming via Bluetooth or the Dock Connector, the EQ works like it is supposed to. The EQ works fine on my old iPhone 7.
iPhone 7, iOS 15