My son's HS has the athletic facilities off limits right now and open for use to only fall athletes. My son, C, instead works out at a local athletic training facility and works on hitting, C mechanics, and throwing at home. He's getting in a ton of work and workouts. Last fall, he was basically catching pens every day and didn't get to do much hitting and only worked out a couple times a week.
I'd love to have things fully back to normal, but he's enjoying being able to work more on his own development rather than catching pens all the time.
Also, he has more time to study which is helpful with 3 AP's