However, considering that a lot of things have been happening in Eight’s life outside of the game’s development, the gallery has been locked for quite some time.
Unless it was opened up in a recent update, there’s no way to tell for sure.
If you’d like, I can send a link to one of Eight’s journals/status updates from Deviantart or send an excerpt.
Update: Unfortunately, the gallery has been facing many issues and the devs couldn't figure out what was causing the gallery not to be implemented despite their best efforts, so there will be no art gallery update in the game.
Apologies for the long wait and disappointing news.
