I feel like this is way too narrow a timeline to view it through. Let's not forget that the majority of footballers professionally were provided a rare period of extended rest during the WC period, since a majority of them obviously did not play the during the tournament.
If anything, my feeling is that injuries have largely increased since the 2 seasons were bundled together during the lockdown period. This is merely a result of that snowballing imo.
Is this a legitimate report? From what I could gather by opening the webpage, it does seem like an opinion piece.