How to delete my apple id but I forgot password

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.

See this Apple article: If you forgot your Apple ID password

If you forgot your Apple ID password - Apple Support

Then see this Apple article: What to do after you change your Apple ID or password

What to do after you change your Apple ID or password - Apple Support

Read carefully what happens if you close and/or delete your 'current' Apple ID, see -> How to delete your Apple ID account

How to delete your Apple ID account – Apple Support (UK)

See also: Understand and control the personal information that you store with Apple

Understand and control the personal information that you store with Apple - Apple Support

First, follow these steps to recover your password

If you forgot your Apple ID password - Apple Support

after that’s complete you can delete your account