In order to get the pump class in COD Mobile 2022, you will need to complete the following steps:
1. Complete the game's tutorials. You can find these under the Training section of the main menu.
2. Reach player level 4 by earning experience points through completing matches and challenges.
3. Purchase the Pump Class unlock with 400 credits from the in-game store. This will permanently unlock the class for use in all game modes.