Location of VS Code preferences

According to Microsoft Docs: Settings file locations:

By default VS Code shows the Settings editor, but you can still edit
the underlying settings.json file by using the Open Settings (JSON)
command or by changing your default settings editor with the
workbench.settings.editor setting.

Depending on your platform, the user settings file is located here:

• Windows %APPDATA%\Code\User\settings.json
• macOS $HOME/Library/Application Support/Code/User/settings.json
• Linux $HOME/.config/Code/User/settings.json

The workspace setting file is located under the .vscode folder in your root folder.

Note: In case of a Multi-root Workspace, workspace settings are
located inside the workspace configuration file.

According to Microsoft Docs: Persisted Zoom Level the entry you are looking for is: window.zoomLevel