All it takes is one shout of "what are you doing!?" from one of the many coaches on the sidelines... it takes two to tango.
The thread still seems to have this duality about a general case versus whatever national final women's game presents lingering issues. I'm here to satirize the general point of view that sandbagging a final game in group play to a 0-0 draw somehow is good for development, soccer IQ, the life lessons of the squeezed out team, etc.
But to be a bit serious for a moment I think it may actually be easier for developed, tactically aware, teams of olders to play for such a non-result. And it does not have to be collusion-y (I do think the Mueller Report definition cited above saying there has to be some kind of smoking gun has relevance). The team that is going to advance anyway simply drops many of the starters to rest them (nothing wrong with that), adopts a defensive shape (nothing wrong with that), drops to four in the back, boxes the midfield or whatever, and chooses not to offensively push in any real way (wherein my issue arises). The team that stands to automatically gain from the sandbagging, recognizing the situation, does the same. Games develop as they proceed. With neither team pushing the result becomes the entropic low spot.
Every system of play is underpinned by a philosophy of play. The philosophy of play can be "our philosophy with respect to tourney play is always to advance as far as possible. Whatever strategical or tactical means we need to do this are therefore appropriate and can be rationalized within our system of play". The risk of injury is a bit different, I'll admit, extending to the welfare of the players. There too, however, there are decisions being made that are informed by the philosophy of play.
Collusion-y shenanigans, where they can be showed to occur, need to be dealt with through appropriate sanctions. But that should remain a high bar. I think the more general issue is philosophy of play.