I mentioned this before on a post. With my Smart Phone Samsung A13. in the Settings open Sounds & Vibrations and scroll down to Sound Quality and Effects, Open that, then go to Adapt Sound and Open that. then take the hearing test and Adapt the sound to your hearing.
I have mine set to Sound Profile 01 which if I remember correct is for like 60+. It will boost frequencies that you can't hear well, etc.. In addition to that you can use the Equalizer. If I'm Streaming with Amazon I set it to Normal and use the Equalizer on Amazon Mobile App. If I'm Streaming with Youtube then I change the Equalizer on the phone from Normal to another setting like Rock, to fit the music.