I have the same thing here on my Macbook but I'm still on Catalina (10.15.7). It's driving me nuts! Can't track down anything that looks relevant at the moment, either.
Process powerd.177 Created UserIsActive "com.apple.powermanagement.wakeschedule" age:00:00:00 id:38654742746 [System: PrevIdle DeclUser kDisp]
filbert42
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