I don't think so for soccer. All the "escorts" I've seen have been for every (starting) member of the home team at minimum and, for professional matches, both teams. I don't think they're finding 22 kids with terminal illnesses, or who have done something heroic, or suffered a loss/trauma.
DS, when he was about 8 or 9 was a ballboy for our local college women's team. He got to every game we could get him to, and at the last game, they announced him with the starting line up and gave him a jersey signed by all the players.
We've had teams be escort for college teams. It's not just professional teams who do this. If your young child (I think they need to be <12yo) is on a soccer team, reach out to a nearby college (or professional team if you happen to have one around) and see what it would take. Usually the kids get free admittance, possibly the parents. Our teams have done escort duty then serve as ball kids for the match.