@MeloGem it's possible to combine to outputs i.e. sinks into one. So you create a third sink which combines both that gets set as an output. The Pipewire manual tells more: docs.pipewire.org/page_module_combine_stream.html I'm assuming pipewire, there wasn't much information about your setup. There are also various guys for it that might make this easier.
re: Linux noob question@ArtistSynth@MeloGem you can save the graph and autolaunch qpwgraph at start, or configure through config files but its not really user friendly