So to answer some if these questions:
Stanford
Cal
Mich
Ohio St
Penn St
Illinois
Oklahoma
Nebraska
Army
Navy
Air Force
Springfield
Iowa(discontinued 2021)
Minny(discontinued 2021)
William & Mary (discontinued 2021).
It is not a dying sport, still very popular at lower levels, where it is dying is at the collegiate level. About 5 million youths in US participated last year, over 20,000 competed in HS
Most top US mens gymnasts do compete in Collegiate gymnastics most recent popular ones being Sam Mikulak and Jonathan Horton. What is sad is that some of these programs offer few scholarships and are not strongly financed by their schools yet they are cutting them. Technically there needs to be at least 20 teams to be recognized as an NCAA sport, but because of pressure and financial support by US Olympics the NCAA continues to recognize it, though I think with these three teams cutting them and possibly one or two more to come, this may be the last year. I am a baseball, fball basketball guy but my youngest son started to participate in gymnastics at age 9(considered a late starter) to better develop baseball skills and loved it and now competes in college. I still can barely pronounce one of the skills they do, but I will tell you once you watch these guys train and the discipline and strength it takes you really come to appreciate it as a sport and realize why the Colleges are making a major mistake in eliminating it on the collegiate level. When is last time you ever hear about any gymnast being in the news for a crime, plus the amount of time these teams spend on charitable contributions in their communities blows away the majority of the bigger sports programs like football and basketball.
It is a damn shame what some of these school administrators are doing