More than a decade ago, when I started listening to podcasts during commuting, I was worried I was cranking the volume too high to compensate fot external noise - trains, buses, traffic, etc. So, I decided to buy a Shure sound-isolating phone. These are monitors for musicians in stage to hear to what they are doing while avoiding the extreme PA towers next to them. They're expensive, but high-quality and isolate nois…
https://jhaudio.com if you're looking for a specific recommendation, but there are many alternatives.