Can IFTTT automate or control an iPhone?
IFTTT

IFTTT requires iOS devices that offer integration or an API that can be accessed. General remote access to iOS is not permitted.

The IFTTT iOS app makes the following claim for iOS support:


  Over 500 apps work with IFTTT including Twitter, Telegram, Google Drive, Twitch, Weather Underground, Instagram, Gmail, and devices like Google Home, Amazon Alexa, Nest, Philips Hue, and your iPhone. The IFTTT app also integrates with the Health app, so you can easily track and maintain your habits.


Supporting apps could work with background push notifications and updates to perform actions. This would work over any user permitted data connection.

Search for IFTTT iOS app to find iOS apps claiming support and related recipes, such as:


How to Set Up and Use IFTTT on Your iPhone
9 essential IFTTT recipes for iOS users


Mobile Device Management

Automation of an iOS is limited compared to macOS. The best way to remotely manage settings on an iPhone is via a Mobile Device Management (MDM) tool.