Hello samarpan113.
Thanks for reaching out to Apple Support Communities. We see that you have a question about your Apple ID not being displayed for a sign in prompt. We will be glad to assist.
Did this prompt to sign in appear as a pop-up on the iPhone or were you attempting to sign in from your settings to manage your Apple ID?
Review this resource regarding potential phishing pop-ups:
Recognize and avoid phishing messages, phony support calls, and other scams
Cheers.