Score Improvement

Hi all,
I have given GRE once in 2019 got 148 in verbal and 150 in quants.
I have been preparing for GRE from 16/Feb/2021 have been following GREG MAT from like 20/April/2021(1 month plan mostly for verbal), 1100 words of Barron. I have completed Maths review, Manhattan 5Lb and ETS books(the new ones) for quants.
I have given 1 ETS PP1 mock and 4 manhattan mocks till now. My score is 157 in Quants and 151 in Verbal consistently. I have analyzed my weak areas as well and have been working on them…still my score is not improving.
My exam is on 27/June/2021. I can reschedule exam because I need at least 320+ in GRE. Can anyone suggest how can I improve my scores and also should I reschedule my exam to get my target score? Any suggestions would be helpful. Thanks in advance.