How do you turn off auto screenshots?
At the moment, there’s a bug that ignores image uploading preferences.
https://forums.zwift.com/t/screenshot-upload-preferences-ignored-november-2022/593737
However, your can set your preference in your settings. If you’re using Zwift on a desktop, there’s an item called “Image Uploading” that you can set to “Only my shots”. Unfortunately, this setting is missing on the mobile version (at least on iPad).
Keep in mind that, at the moment, even if you set this setting to “Only my shots”, autogenerated screenshots are still taken due to the bug mentioned above.