We’re using the older black and white Noto emoji font that doesn’t contain newer emojis (and does not get updates). It was added on a whim as part of testing recent text shaping/compositing work. If this is something you think you’d actually use, we could consider using the color version of the font (which does get updated), but there is a considerable difference in resource size (419KB vs. 7.3MB).
Iy would seem that there’s not been demand for such a feature.
Note that ARC is an entirely different app, and this relates to Roon only.