Hello Kubabinho.
Welcome to Microsoft Community.
Regarding to your information I assume that you don't have the power saver plan.
It appears that the power plan is disabled by default in Windows 11. You can enable it by going to Settings > System > Power & battery and
then choose the power-saving mode on that page.
Alternatively, you can try using the command to enable the power-saving mode.
Please Run Powershell as administrator and then enter this command.
powercfg -s a1841308-3541-4fab-bc81-f71556f20b4a
You can also check if Asus has any related software for power control on your laptop, such as a one-click power mode switch.
For specific details, you can contact Asus official support for assistance.
If there is anything not clear, please do not hesitate to let me know.
Best Regards,
Tommy-MSFT | Microsoft Community Support Specialist