I do not know if I am simply an idiot, but there seems to be a critical issue preventing the player from entering the gallery via the chair in the house - after clicking 'yes' in the prompt about whether to open the gallery or not, the gallery simply does not open. To my knowledge, there is no other way of accessing the gallery, making it completely inaccessible in the current state of the game.
(I am indeed an idiot, I forgot the gallery moved to the elven city. However, the old gallery area indeed remains identical, just with the interaction not working? Idk I'd remove that, but your call)
Additionally, HF3 is unavailable on the legacy store page as of this moment.