There's another way but you need to progress through the storyline until you hit a big plot point involving the gargogyle
Don't think that part is any confusing, especially when I don't remember anyone asking about it. You got into the big gate, you talk to Anita, intense conversation, big plot point, big reveal, basically emphasizing that whatever goes on in that room is super important and you need to see the end of it, only to get pushed and fell to some other place. Now you've done everything in that other place, what do you do? You get out of there and return to the big gate of course
The one part that is confusing is what to do when you return to the gate and see that shadow blocking the way tho, just interact with it or something