Won't pretend like I know much about the justice system, but wouldn't they just say "no longer under investigation" if they felt he wasn't involved? I know it could take a while, but anyway.
Depends who you follow I guess. I guess not so much journos or reporters, as they know they can't really talk about it. But there was quite a bit of it among other high follower fan accounts pretty much (and many supporters around the world in general) who were and are uncomfortable at how Ronaldo is essentially deified by United's social media when he may or may not have done what was accused (but it's something we'll never know due to it being essentially impossible to prove).
My Greenwood bit is essentially saying, Greenwoods case is ongoing. Bissouma is technically still under investigation. Wherever you stand on Ronaldo, it is a real thing that matters to a lot of people out there. Signing Bissouma, under investigation, while having Greenwood part of the club with his ongoing case, is just a really bad look. So yes, it kind of is more OK for Spurs to sign him than United. It's unrelated to United, but at the same time, if we go out and buy him while being under investigation and something actually happens against Bissouma, then it paints a picture that United don't give a feck about sexual abuse. Hell, even without something progressing, it'll start to paint a picture of "United doesn't care about abusers as they repeatedly ignore the accusations and parade them as stars regardless".
Of course it's of interest elsewhere, it'll receive a vocal minority complaining about it and feeling uneasy about Bissouma signing for Spurs due to the ongoing investigation, however it's obviously just bigger when it's related to United. But it also doesn't get any "real" media interest, because it's not something the media can actually talk about? Beyond a footnote of "while he is still under investigation", what else is there to say? They are reporters, they aren't giving opinion pieces related to social issues and where they stand on it. You'll see mentions of it on social media and that's it.