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

https://github.com/sgn/void-packages qt6-webengine-cross
https://github.com/void-linux/void-packages/pull/42427

qt6-webengine: cross build
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#### Testing the changes
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A patch file from https://github.com/void-linux/void-packages/pull/42427.patch is attached