On Windows use https://github.com/mcmilk/7-Zip-zstd
On Linux use literally any tool that exists ever.
Can you send it simply in zip format?
If you really need a zip you can just use artifacts from github actions CI. https://github.com/HansKristian-Work/vkd3d-proton/actions.html?&query=workflow%3AArtifacts+(Package)+branch%3Amaster+&workflow_file_name=artifacts.yml
This file on Windows 7 work for Cyberpunk 2077?
Nothing extracted yet.
How open zst file?