KHSAA Guidelines provide for no equipment, shared footballs, pads, etc. There is just not much to sanitize, especially if you practice outside. If a school is not prepared to use the weightroom, don't use it. I get that. I would guess there are very few schools that can properly social distance in their locker rooms. Don't use the locker room, until you have a plan. If a team has scanner thermometers they ought to be able to have an outdoor body weight workout using social distancing. If you want to be wild and crazy, each player could have a single plate or dumbbell to use for a workout. Those items could be sanitized after each workout, if the school or coach can get the supplies. It just doesn't seem that complicated to me.
There is some risk of illness in having football workouts at school. There is a lot more risk in working out with a "trainer", at the YMCA or other gym, youth league practice, AAU practice, etc. JCPS, Oldham Co. and others have it backwards in my opinion.