To turn off the TikTok Shop feature in the iOS app, follow these steps:
1. Launch the TikTok app on your iPhone.
2. Tap on the "Profile" icon located at the bottom right corner of the screen.
3. On the profile page, tap on the three horizontal dots (ellipsis) in the top right corner.
4. This will open the Settings menu. Scroll down and select "Privacy."
5. In the Privacy settings, tap on "Personalization and Data."
6. Locate the "TikTok Shop" option and tap on it.
7. You will find the toggle switch to enable or disable the TikTok Shop feature. Turn it off to disable the feature.
Once you've turned off the TikTok Shop feature, you should no longer see related content or recommendations related to the in-app shopping experience. Please note that the steps mentioned are based on the current knowledge and understanding of the TikTok app and its settings as of 2023.