Ballance on brave is not the same on uphold

My balance on Brave shows as 35.750 BAT. I then registered an account on uphold, but my total uphold balance is only 16.50 BAT.
I don’t know why it doesn’t sync.

What Operating System and Brave version are you using (Menu --> About Brave)?

I’m running on Windows 10 pro
Version 1.31.88 Chromium: 95.0.4638.69 (Official Build) (64-bit)

Is your browser wallet currently verified? (yes/no)
Yes

What date did you verify your wallet?
Oct 25, 2021