There are a set number of fans who follow a sport
there are a set number of fans who will follow a team
there are a set number of fans who will attend games
there are a set number who will tune in to watch
There is an overlap. In some sports the overlap is large in some it is not.
Volleyball at SU has a small following. Volleyball at Neb has a huge following.
Hockey around syracuse has a decent Crunch presence and a decent HS presence but has that transcended to SU womens games? Not as much
Lax around Syracuse has a big HS following and a big SU following, does that mean that all watch it on TV? I watch most every game but have not been to a game in yrs.
Soccer around Syracuse has a decent HS following and with SU men being pretty good a decent group there.. Most likely though less people watch SU soccer on ESPN+ than do LAX. Its probably the X number that would attend that would also watch. Where as Lax has vastly more that would watch than would ever attend.
College hockey is huge in some areas with crowds of 10-15K in some of those towns, the playoffs and Final 4 are well attended but you go to a game at Cornell and will get a bigger crowd than most any routine game in Boston.
Soccer is big in the US but its the dedicated people attending and watching not the casual fan. Lots of people turn on TV and see a fball/bball game and may not turn the channel but soccer isnt holding them. When the US plays a big game in a town and draws 20-30-40k that might be 50% of the locals that care but fball does it and its 5% of the people who care.