Chasing Sunsets and Leap of Faith are pretty easy to exist in the same world, nothing is really "outlandish" about their settings, they're worlds close to our own. Artemis and Chasing Sunset's colab is more of a joke/marketing stunt as they use the same model for their MC, no point trying to explain any further than that, the tech in both worlds seem to be too far apart to make a good connection.
I see this colab more like seeing The Dragon appear in CoBD, funny joke, nothing more to take from it.