I want to know the Apple ID by phone number

See the following Apple articles:

If you've forgotten your Apple ID email address or phone number

If you've forgotten your Apple ID email address or phone number – Apple Support (UK)

Use your mobile phone number as your Apple ID

Use your mobile phone number as your Apple ID - Apple Support

FYI: You are sign in here .  .  .  with your Apple ID & Password.

Your Apple ID is the personal account you use with all Apple products and services. It includes the email address and password you use to sign in, as well as the contact, payment, and security details that you use with Apple.

You can’t merge multiple Apple ID accounts.

If the above doesn't work, please try restating your question and explain exactly what you are trying to do. Include whatever problems you are having and any error messages.