The study you provided on vaccination's impact on transmission suggests to continue masking...

"Thus, the current evidence suggests that current mandatory vaccination policies might need to be reconsidered, and that vaccination status should not replace mitigation practices such as mask wearing, physical distancing, and contact-tracing investigations, even within highly vaccinated populations."

Also, the study on masking suggests the results are not concrete:

"There is uncertainty about the effects of face masks. The low to moderate certainty of evidence means our confidence in the effect estimate is limited, and that the true effect may be different from the observed estimate of the effect."

Here is a study from Nature suggesting a positive correlation between masking and reducing respiratory infection rate.

Efficacy and practice of facemask use in general population: a systematic review and meta-analysis | Translational Psychiatry (nature.com)