I also have Pipewire running on NixOS. This is what I recommend configuring:

  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    jack.enable = true;
    pulse.enable = true;
    socketActivation = true;
  };

That allows me to run pretty much any application that uses ALSA, JACK, or PulseAudio.