Xiaomi Mi True Wireless Earphones Lite cant connect to each other

[mr.Ponk]

Hello,
I recently bought Mi True Wireless Earphones Lite but cant connect them to work in stereo. I can connect one earphone to one device and the other to other or even both headphones to one device, but I can only play music from one. How do I connect my headphones to each other to work as stereo ?

Thanks in advance