How to synchronize sound in two independent bluetooth headphones?

Question

Bluetooth

Good day, I want to try to implement tws-headphones on my own
And here the question arose of how to synchronize both headphones with each other
Or use the main-connected scheme, but this option is undesirable for me due to the difference in design and uneven power consumption, so I would like to implement namely distribution to two headphones independently, but I don’t quite understand how to synchronize them with each other, that is, there are two points:
So that when connected to one, both are connected, and so that the sound is played at the same time
Tell me please, how can this be implemented?

Answer 1

master-master?