There is a new pull request by q66 against master on the void-packages repository

https://github.com/void-power/void-packages os-prober
https://github.com/void-linux/void-packages/pull/12045

os-prober: fix the way scripts are installed for different archs
The old way simply installed stuff for all as if they were x86, the new way follows what the Debian scripts do.

A patch file from https://github.com/void-linux/void-packages/pull/12045.patch is attached