Problem description

I’ve just freshly built a new PC and installed a fresh Windows 11.
However I’ve the problem that when I want it to go into hibernate, it instead keeps everything on (fans, pump, rgb on keyboard, speaker, mouse, mainboard), except for the screen, which will go into power saving mode.
When I move the mouse, or press a button on the keyboard, it will instantly greet me with the lock screen.

I tried everything I could come up with and find on the internet. However I’m unable to find the reason why it is not working.
Any help is greatly appreciated!

What the reports show

This is from the event log from the Kernel-Power source:

An attempt was made by a process in user mode to change the system state by calling the SetSuspendState or SetSystemPowerState API.
The system session has changed from 0 to 1.
Cause: ScreenOffGracePeriod
BootId: 13
The system session has changed from 1 to 2.
Cause: SxTransition
BootId: 13
The system session has changed from 2 to 4.
Cause: InputHid
BootId: 13

This is from powercfg /systempowerreport
System Power State: Screen Off

SESSION ID	START TIME	DURATION	STATE	ENTRY REASON	EXIT REASON	% CAPACITY REMAINING AT START
70	2024-03-18 20:33:54	0:00:01	Screen Off	Hibernate, or Shutdown	Input Mouse	–
71	2024-03-18 20:34:29	0:13:25	Active	—-	Unknown	–
72	2024-03-18 20:47:55	0:00:00	Report Generated	—-	—-	–

powercfg /requests shows nothing in any category

What I did so far:

Hardware

Unplugged everything except for monitor and mouse/keyboard (tested both separately)

UEFI

Disable WOL
Disable Wake Timers
Enabled ErP

powercfg

powercfg /h OFF followed by powercfg /h ON
powercfg /h /type FULL

Device Manager

Went through all devices and disabled wake up events for every device that was capable

Control Panel > Power options

Turn off monitor after: never
Disabled wake timers
Allow USB energy saving

Windows features

Ensured that Hyper-V is not installed