There is an updated pull request by rafeyu against master on the void-packages repository

https://github.com/rafeyu/void-packages fix-xfce4-power-manager
https://github.com/void-linux/void-packages/pull/34229

xfce4-power-manager: add upower as dependency
Xfce4-power-manager itself is interface of upower. Without upower, xfce4-power-manager installed as standalone application is unusable.

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#### Testing the changes
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A patch file from https://github.com/void-linux/void-packages/pull/34229.patch is attached