we discovered this set the other day by olivvybee (Liv Asch), and obviously these are delightfully thematic for our instance. you should be able to find them in our emoji picker as follows. the emoji icon, at least on desktop, is the fourth from left smiley face on comment/post UI:
Hey All, we’re aware of some sizing issues with Federation in regards to these new emoji. Working on solving those, hat tip/thanks to @sunaurus@lemm.ee for bringing this up.
I was having problems with them being blurry on desktop Firefox (mobile was fine), but they look good now.