The "first secret" has already been found in Battlefield 6. A player managed to access a room that could not be accessed under normal conditions.
Mobile_Cyberdemon_as posted a recording of the journey through the texture in the community. Behind the closed door was not emptiness, but a rather elaborate large room.
There are tables, lockers and shelves on which you can see equipment and tools. It seems that there are no interactive elements in this location. It is not yet clear why it was created at all — nothing can be seen through the "glass" on the door.
Some players think the maps in Battlefield 6 are too small — one of the most popular comments under the post was a joke question: "Is this a new map for Conquest mode?"