I know that they eventually do, but after finishing the corresponding chapter, the drawing I made on my e4 playthrough still isn't showing up which sucks because I put effort into it. When will it show up? It feels like the game just didn't save it.

EDIT: A friend told me it was saved in the game's folder:
C:\Program Files (x86)\Steam\steamapps\common\I Wani Hug that Gator!\game\drawings