1,498 junk miscellaneous items
The Forever catalog holds 1,498 junk miscellaneous items, topping out at item level 79 with Incomplete Staff of Order, Suppression Device Receipt, Bindings of the Windseeker. Mounts, companions, junk, and everything the game files nowhere else, Classic Era and Forever alike.
By quality: 563 common, 404 poor, 239 epic, 162 rare, 121 uncommon, 9 legendary. Item levels run from 0 to 79, for characters from level 1 to 60. 1 require a level above the cap of 60: leftovers from later expansions that the game still carries, listed here because they are in its tables. 541 bind when picked up and never reach the auction house; 957 can be listed.
The highest item levels here: Incomplete Staff of Order (79), Suppression Device Receipt (79), Bindings of the Windseeker (70), Bindings of the Windseeker (70).
One profession makes 1 of them: Engineering (1). The rest drop, are sold by vendors, or come from quests.
Source: World of Warcraft: Forever game data and Blizzard's Game Data API. Updated with each game build.