Thanks to the great work done by @wrenix, @valpackett, and many others (certainly not me), I've finally gotten calls working on my Fairphone 5.
While there's some kinks left to be ironed out, call quality is excellent out of the box (certainly better than my PinePhone (Pro)).
I've pushed a `linux-sc7280-calls` kernel to my arch repo for anyone who wants to try it. The following PR discussion should help set it all up:

