The factory image was released on the 18th of October, Beta1 on the 16th of October. If you read the changelog of beta2 you will see that some images got based on testing or unstable branch. Only Beta1 (2020-10-27) was based on stable, which was the first update for Pinephone CE Manjaro. As documented on the changelog of beta3, the second update was then Beta2 (2020-11-09). Which concluded in the 3rd update as of Beta3 (2020-11-24). So if your kernel says 5.9.9-1, you most likely are up to date.