This worked for me (idk why or how though). was trying everything, all other rooms were lock, nothing worked.
On the left of the doors there is a ledge above the "Kabayan foods" sign. I jumped up on the ledge to see if it goes anywhere. ran all the way to the left then all the way to the right and tried jumping on a little scaffold thing. When realizing it didn't go anywhere I looked for another way... BUT now the gate on the far right was open.... idk why it opened or what I did to make it open.
Just wanted to say the steps I did before it opened. Hopefully that works for some of you