Schools are allowed to suggest workouts for athletes who are away from campus but they're not allowed to mandate any conditioning drills or anything of the sort. I've interviewed most of the Mizzou coaches since the start of quarantine and they've all given their athletes a set of recommended workouts to follow while they're away from the facility ... but they're not allowed to monitor them on a daily basis like they would under normal circumstances. Not all athletes have facilities or resources to work out like they would in Columbia, but some have found gyms or local businesses that offer facilities to train for baseball, softball, basketball, etc.
Here's some info the NCAA has been updating during the pandemic in terms of what's allowed and what's not allowed:
May an institutional strength and conditioning coach or coaching staff member distribute workouts to student-athletes to use for voluntary athletically related activities?
Yes, provided the workouts are approved by applicable institutional athletics and/or medical personnel and otherwise adhere to applicable legislative, policy and institutional requirements (for example, Interassociation Recommendations Preventing Catastrophic Injury and Death in Collegiate Athletes). As a reminder, an institutional staff member may not supervise or conduct such workouts and it is not permissible for an institutional staff member to post (for example, social media) images and/or video of student-athletes engaged in voluntary athletically related activities.
May a student-athlete film voluntary athletically related activities and report back to coaching staff members while home and enrolled in online classes?
No. A student-athlete may not report voluntary athletically related activities to institutional coaches or staff members. However, student-athletes may post to their own social media account a voluntary athletically related activity, not at the direction of an institutional staff member. This action does not constitute reporting back to an institutional staff member.