What I’m trying to do
Show scrollbar in the left side panel
Things I have tried
Search Preferences and help docs
Show scrollbar in the left side panel
Search Preferences and help docs
The scrollbar should appear if there’s enough content to overflow the vertical space.

Are you using a community theme or CSS snippets? The issue could be there. Maybe a screenshot could help as well.
All the steps in the troubleshooting guide are always good to check off.
Thanks. I use default theme no CSS styles.
I can see the scrollbar in the editor but not in the left sidebar nor in the Settings panel.
I use the latest version on Windows.
Could it be some setting?
Found it. It was a plugin: YairSegel/ObsidianMinimap: Add a minimap to your Obsidian notes.
After uninstalling scrollbar shows as expected.