I think this proposal is particularly dangerous when a software provides availability on multiple platforms, but we don’t want to recommend it on multiple platforms. LibreWolf would be a good example of this actually, where even if there were some platforms we’d want to recommend it on, they certainly offer downloads for platforms we definitely would not want to recommend it on at this time.
This is a confusing user experience though. It works in other categories like News Aggregators - Privacy Guides because the recommendations are generally only available on a single platform on the first place.
Additionally, I completely disagree with the premise that a privacy app being available or not on someone’s chosen operating system is irrelevant to privacy.