https://www.gamespot.com/articles/call-of-duty-ww-2-beta-level-cap-increased-more-un/1100-6452896/

Just as developer Sledgehammer Games said it would, the studio has now increased the level cap for the ongoing Call of Duty: WWII multiplayer beta on PlayStation 4.

The level cap is now 25. As a result of the level cap increase, players can now unlock things like the Bouncing Betty mine and the Fighter Pilot scorestreak.