Unable to unable private browsing on Firefox for iOS

"Hello, I am trying to enable Private Browsing on my Firefox app for iOS, but I cannot find the option in the settings. I have tried restarting the app and checking under the 'Settings' tab, but it is still not showing. Could you please guide me on how to enable this feature on my device? I am using the latest version of Firefox for iOS (Version 137.0), and I am on iOS version 16. Please let me know if there's something I am missing or a specific setting I need to adjust."