It’s a brain thing, my hearing itself is above average for my age (40), so I’m not sure what exactly can be done, but there was an article many years ago about someone (Bose?) working on aids for that issue, no idea what came of it. I guess all modern hearing aids have some focus mode.
[0]: https://en.wikipedia.org/wiki/Auditory_processing_disorder
edit: In case there’s an airpod suggestion, I’ll also need to know if that feature works on Android, it’s not crippling enough to make me use an iPhone.