How can I find my friends phone on find my own

Hey there,

go to find my app in your device > choose “Me” icon > swipe up click on “ help friend”

and I suggest you to see this article >>>If your iPhone, iPad, or iPod touch is lost or stolen - Apple Support

They can also go to any browser on any device and go to https://icloud.com/find and sign it without needing 2FA codes