How to locate my lost iPhone in Find My?

Use any internet browser and log into www.icloud.com/find

Note that no two-factor authentication code is needed when you use that web address (with the /find).

Also see the following Apple articles for information about lost or stolen iPhones or iPads: If your iPhone, iPad, or iPod touch is lost or stolen - Apple Support and

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

If you know the Apple ID and the password, click on (or log into) www.icloud.com/find

The Apple ID & password are all that you will need.

If that doesn't work, please reply with information about exactly what happens when you do the above.

Sorry but this isn’t helpful to me