How to get CMF parts from builders app

[DannyBoy]

I do know how to extract parts from sets, but I also noticed some CMF part say that the original part shape is from LEGO Instructions App with the most recent example being the snowman mask from series 23 but the builder app doesn't even have a pdf let alone a 3d model for minifigure series. So I figured there must be some other way to get them if so i would like to know how