From Canalys:

Smart personal audio devices grew 20% in 2020 to reach 432 million units, while wearable bands grew 10% to reach 185 million units. Both segments continued to be strategic winners as countries emerged from the extended battle against COVID-19, where people grew more health-conscious and became active outdoors.

To give a sense of how big Apple’s lead is here:

• Apple/Beats audio shipments for 2020Q4: 29.5 million units
• Second place? Samsung: 9.4 million units

That translates to Apple market share of 26.2%, Samsung 8.3%.