Honestly, after reading the rules I'm not sure why they were initially saying he would not count.
https://apnews.com/article/nfl-injured-reserve-pup-list-07369696d0a0c5a91f89ec9eea255a5d
If a player is placed on this list before the regular season begins, he could miss the entire season unless — per a rules adjustment this year — they are designated to return during the roster cutdown to 53 players after training camp. Teams can designate up to two such players to return.
NFL teams can designate up to eight players to return from IR during the regular season (and up to 10 if they make the postseason) and an individual player can be so designated twice.
Players designated for return from IR before the season count against a team’s eight- or 10-player limit.