NFL teams are permitted to meet with up to 30 draft prospects each year, officially. Of course, there are many ways to scout a player unofficially and there’s nothing really regular or normal about 2020 as is. That being said, the LA Chargers have been connected to over 30 prospects thus far per the count of those who track such things.
One such site is WalterFootball and I’ve done the liberty of simply reorganizing their list into going by position instead of alphabetically. I can’t confirm or deny these meetings and the degree of importance they were to the team, but it gives you an idea of who or what they’re looking at.