Allow multiple devices to be connected over bluetooth for calls

Scenario:

Me and wife get into car. Both phones were set up previously for media/calls. Only one phone get's connected for media and calls. Let's say it was mine. Both phones are in phone holder and closed. Wife receives a call.

Problem:

As wife's phone is currently not connected, she has to pick the phone physically to answer. It is fine if she is just a passenger, but what if she is a driver?

Solution:

Allow only one device to be connected to media (like it is right now), but connect both for phone capabilities. Optionally, in number pad/search, add ability to select a phone in use.

P. S. This feature existed in my last car - `14 Volvo S60, so I miss it very much