Unfortunately, for anyone concerned with security or privacy, Windows 11, in any form outside Enterprise, should not be considered at all.
I never did find a proper fix for this issue; that is to day, I never did find any fix. Hibernate and sleep have been problematic on Linux for quite awhile, so much so that some major distros are disabling the ability to hibernate based on technical considerations.
In Windows{10,11}, it's as easy as a few power settings adjustments. In XFCE, it seemingly cannot be done; and, like I stated before, the issue is an historical problem with XFCE. Sad.