Poweramp Equalizer works on Android 9+ (Android 10+ recommended).
Poweramp Equalizer is an advanced audio processing app based on Poweramp player with many features and options from the original app
Equalizer Engine
Poweramp-based equalizer
configurable number of bands:
fixed 5/8/10/12/15/16/24/31/32
or custom 5-32 with configurable start/end frequencies
+/-15dB
powerful Bass/Treble tone control