It's highly unlikely they'll go back and add this to the older content, not when there's so much to do with getting the main plot moving forward which is what they want to focus on. But check out
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which adds this into the game as well as some other goodies.
The
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has a button you can use to unlock the gallery. With just console commands the only method I'm aware of is to use "call [label]", where [label] is the name of the scene you want, click through the scene there (it'll deposit you back to the console when you're done), and then it'll be unlocked in the gallery from then on. The full list of scene labels is in game/Database/Gallery.tsv but I'll copy-paste it here: