1,498 junk miscellaneous items
The Forever catalog holds 1,498 junk miscellaneous items, topping out at item level 50 with Kovic's Trading Satchel, Kum'isha's Junk, Lard's Special Picnic Basket. Mounts, companions, junk, and everything the game files nowhere else, Classic Era and Forever alike.
Source: World of Warcraft: Forever game data and Blizzard's Game Data API. Updated with each game build.