It was crazy to see stadiums with 50,000+ thousand seats completely empty during Covid and that would have had a massive impact on the revenues for the club's.
In many cases that seems to be what happened, but there are some football clubs that have increased their revenue incredibly. It is the case of the Manchester City, for example, whose income from TV rights went up 55% between 2020 and 2021 (and partnerships increased by 8% also). One could think that the biggest income for a big club comes from the ticket sale, but its relative weight decreases year by year, especially for the most famous teams which have supporters all around the globe.