There is a new pull request by Wychmire against master on the void-packages repository

https://github.com/Wychmire/void-packages mutter
https://github.com/void-linux/void-packages/pull/15530

mutter: update to 3.34.1.
requires #15506

A patch file from https://github.com/void-linux/void-packages/pull/15530.patch is attached