At least for the time being, and likely indefinitely, one thing that the NFL has failed to do throughout the offseason process has been to give rookie college free agents and other first-year players the opportunity to participate in tryouts, the way it would be traditionally constructed during rookie minicamps around the league.
Given the circumstances, with teams all across the NFL trimming their rosters down to 80 players, it would seem to be exceedingly unlikely that they will be making this modification during the 2020 season. They will simply be lost in the shuffle. After all, in 2011, when the players were locked out until training camp, they never opened up a window for such players to be awarded tryout invitations.