How about a little community effort to solve the phone call audio routing problem?

[Caliga]

They said routing. I assume they already know where the problem is and that it’s above driver level.

Librem 5 Birch Shipping Announcement – Purism

OK, lmddgtfy https://wp.puri.sm/posts/librem-5-june-software-update/ Work has continued to extend wys to instantiate PulseAudio’s loopback module—which ties the modem’s and codec’s ALSA devices together when a call is activated, and de-instantiates the module when the call is terminated. Since this causes conflicts with hægtesse, a scheme was devised to keep both hægtesse and wys from running at the same time.

Maybe this?
machine-check/whitelist: need a whitelist to start on the phone (!12) · Merge requests · Librem5 / Wys · GitLab