You cannot manually "access" a developer build. However, you are likely already playing on the latest IW 22IWD branch when you launch Modern Warfare 2 (2022) or Warzone .
The introduction of the Ledge Hang mechanic, allowing players to peek over walls or use a secondary handgun while hanging. call of duty modern warfare 2 iw 22iwd new
, specifically its underlying technology, the (which may be the "IW 22" or "IW 22iwd" referenced in the user's shorthand). The "New Era" of Call of Duty You cannot manually "access" a developer build
Here are a few resources that might be helpful: specifically its underlying technology
Provides more detailed bullet holes, dirt, and wear on weapons and vehicles.