How to track my stolen iPhone?

In addition to the advice and info. given in the previous reply:

For an iPhone that has been stolen:

You may want to report the loss to local law-enforcement.

See if anything here may help: Find your lost iPhone or iPad - Apple Support

NB: above article also says:

"If Find My wasn’t turned on for your device before it was lost or stolen, it won’t appear at iCloud.com/find or in the Find My app and you can’t mark it as lost or remotely erase it. To protect your personal information, you should sign in to account.apple.com and change your Apple Account password straight away".

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If you can mark your device or item as lost:

it will lock your device with a passcode or your Apple Account password.

See: Use Find My to locate your lost Apple device or AirTag - Apple Support

None of your fellow users in this forum can track your phone. Apple does not get involved with lost and stolen phones.

Find My is the only way you can electronically track the location of your iPhone – but it must have been enabled when the phone was stolen, and there are various things that can keep you from seeing a location.

If you did see a location, what would you do with it? Hopefully not go in person to confront the criminals yourself. You might lose a lot more than just your phone.