I recently updated my Brave browser to “Version 1.52.129 Chromium: 114.0.5735.198 (Official Build) (64-bit)” and I am experiencing an issue with the scrollbar when visiting https://bing.com.
The scrollbar appears in the correct position while the website is loading, but after loading, it disappears.
I tested the 3 extensions I see on your screenshots and they didn’t cause issues in Nightly.
But you should disable all extensions and enable one by one until you find the problematic one.
If it works in InPrivate and not in Normal windows, it usually means, like 98.72% of the time, it is an extension, because by default Extensions don’t run InPrivate, while Brave settings are global across modes so Shields shouldn’t have anything to do with it.