Does the H1 chip (in Airpods 2 and PBP) support streaming from one device to two sets of earphones?

Solution 1:

I think you’re referring to Airplay 2, which now allows compatible devices to Airplay to multiple devices (such as both your HomePod and your Smart TV).

AirPods use Bluetooth, so this does not apply unfortunately (Airplay uses Wi-Fi).