Activision Assist has shared an updated article stating the the final, highest level cap the WWII beta will see is level 40. Currently, the beta level cap is at 25 on PlayStation 4. The Activision Assist article states that the level cap will “gradually” increase to level 40 over the beta period.
In addition, Activision has stated that all of your beta stats and unlocks will not carry over to the final game at launch on Nov. 3. Your stats will be reset at the end of the beta. For PS4 players, all of your stats, however, will carry over from beta weekend 1 to weekend 2.
SOURCE: Activision Support