Step 1: Equip the scanner
First, make sure you have the scanner equipped by holding down the middle mouse button (or tab on a controller).
Step 2: Activate the scanner
Press the right mouse button (or RB on a controller) to activate the scanner.
Step 3: Look at the R1-RB door
With the scanner active, look directly at the R1-RB door.
Step 4: Keep the scanner active
Keep the scanner active and continue looking at the door until it opens.
Step 5: Enter the room
Once the door is open, you can enter the room and explore.
It's worth noting that this bug can reportedly work on other locked doors in the game, so feel free to experiment and try it out in other areas as well. With this handy trick, you'll be able to explore all of Atomic Heart's secrets and hidden areas in no time.