If you just want to stream audio and phone calls , you are just fine with one connection hearing aid (the right device). So you only need one connection to the right side.
Because phonak devices uses for streaming only one connection to one device of a pair of hearing aids, and this is normaly the right aid, which is behaving as the master hearing aid.
The master hearing aid is also wireless connected to the left (slave) hearing aid and the right hearing aid transmitting the audio stream to the left hearing aid.
So it is all good and streaming/phone calls are working if you have paired bluetooth just with the right hearing aid device.