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

https://github.com/sgn/void-packages qt6-webengine
https://github.com/void-linux/void-packages/pull/38509

WIP Qt6 webengine
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Never tried to cross build
Functionality works (at least can view youtube video on x86_64-musl)

#### Testing the changes
- I tested the changes in this PR: **YES**|**briefly**|**NO**
[ci skip]

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A patch file from https://github.com/void-linux/void-packages/pull/38509.patch is attached