Just realized that my Thinkstation P7 in windows 11 has no sleep option now. I think it was showing up when I first started using it. Now when I run powercfg -a i am getting this:

The following sleep states are not available on this system:
    Standby (S1)
        The system firmware does not support this standby state.

    Standby (S2)
        The system firmware does not support this standby state.

    Standby (S3)
        The current Device Guard configuration has disabled this standby state.

    Hibernate
        Hibernation has not been enabled.

    Standby (S0 Low Power Idle)
        The system firmware does not support this standby state.

    Hybrid Sleep
        Standby (S3) is not available.
        Hibernation is not available.
        The hypervisor does not support this standby state.

    Fast Startup
        Hibernation is not available.

Anyone know why is that?

Thanks for the reply, disabling the FW Protection does bring back S3. But I have a new question related with sleep, why isn't modern standby supported by the firmware? (S0ix) It seems to allow computer to go in sleep state while having FW protection enabled.

Support for Modern Standby depends on the hardware platform. P7 is based on the Intel FHF platform, which does not support Modern Standby.

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Understood, thanks!