How do I find my iPhone if the ringer is turned off and I can’t hear it when I call from another device?

You can use the find my app, there’s an article at the top of this page that you might find helpful.

However, the article doesn’t explain that if the other person doesn’t have an apple device, you can log in to find my online by logging on to your iCloud account. You can do this from any web browser.

Here’s a handy guide that shows you how to do this - https://support.apple.com/en-gb/guide/icloud/mm4c0bd11731/icloud

It’s also good to keep your security info up-to-date to ensure you don’t encounter any problems 😊

Using "Find My" plays a sound regardless of the ringer position:

Use the Find My app to locate a missing device or item - Apple Support