To use it properly, you also need to specify the career you want your Sims to be promoted on. After turning on the cheats feature, you need to enter Careers.promote in the cheat console while selecting your desired Sim and hit the enter key on your keyboard.
Regardless of the reason, it’s extremely simple and straightforward to use promotion career cheats in Sims 4. Moreover, you may have lost your saved game file that was following a specific storyline, and you want to gain the same experience with your new game by progressing and promoting your Sims faster and matching your earlier career potential in the game.