2, The Jaguars are spending time with their young players in mandatory camp
As previously noted, most veterans have been excused from mandatory camp, the biggest exceptions being outside linebacker Josh Allen and wide receiver Calvin Ridley. This isn't surprising when you take into account that Ridley hasn't played football in more than a year and is still getting acquainted with the offense. On the other hand, Allen missed OTAs and just returned to the team, so the coaching staff surely wants to see what kind of shape he's currently in.
Without other veterans in attendance, most of the Jaguars' young players have gotten lots of coaching. Although there are no padded practices, players can work on their technique, hand usage, footwork, and anything that can help them get better.
For example, Anton Harrison, the 27th overall pick in this year's draft, is making the transition to right tackle and he can benefit from all the reps that he can get.
Similarly, rookie cornerback Christian Braswell is making the transition to the slot, where he can be the most effective. Antonio Johnson is another first-year player who might be making a position switch in 2023, so he can certainly use additional reps. Then, there are players such as Chad Muma and Devin Lloyd who are entering their second season but still have room for improvement.
Simply, veterans who are entrenched at the top of the depth chart won't get much out of mandatory camp. On the other hand, these practices are invaluable for players that are competing for a significant role or a roster spot next season.