"The Safari web extension packager enables you to package and distribute your Safari extensions using App Store Connect from any web browser, without requiring a Mac or access to Xcode."
I upload the unzipped folder I'd test in Chrome://extensions to the Safari web extension packager in App store connect.
I get error: Embedded binary's bundle identifier is not prefixed with the parent app's bundle identifier.
The only solution i've seen to this error involves xcode/a mac, being without which doesn't help