Language fallback or freemode should throw 404 if content is not translated
If you on a non-translated alternative language page and your language configuration is on fallback or free mode it should be redirecting to a 404 page. For example /de/article has no translation for EN, in the case /en/article should throw a 404.
What actually happens is that /en/article is accessible but with default language content, in this case German.
TYPO3 version: 9.5.7