The latest update to the Chrome beta on iPhone and iPad introduces an additional level of security for incognito mode.
If enabled, Chrome will require you to authenticate through Touch ID or Face ID to access your open tabs in incognito mode. The feature can be turned on in Settings > Privacy, but Apple TLD couldn’t get it to work.
Open tabs will also be blurred if you exit the app and haven’t authenticated.
The feature will come to the App Store version of Google Chrome in the near future. For now, install the TestFlight beta to try it.