Q.Purple beautyberry planted last fall,now September, I have white berries!
When I planted, it had gorgeous bright purple/pink, almost neon berries. Now this year, slow to grow this late spring, came alive in June. The berries are white!?!?

Certified GKH Gardening Expert
It doesn't exactly look like a beautyberry, but there are upright varieties. I can't tell if the leaves are opposite, which is a characteristic of beautyberries. I'm wondering if something else took over the location of your beautyberry.
Those look like flower buds, not berries, and you can see some starting to open. I did see some photos of beautyberries with blooms alongside the berries, which is odd, too, because they normally bloom in spring.
Here is more about beautyberries:
https://www.gardeningknowhow.com/ornamental/shrubs/beautyberry-shrub/american-beautyberry-shrubs.htm