Many customers have attempted to retrieve their Yahoo Mail accounts without providing their phone number, but ultimately found themselves unable to do so. As previously said, your only remaining choice is to respond to the security questions if you do not have the phone number or the backup email address.

 
Visit the Yahoo Mail login screen. After entering your email address, select Next. When prompted to enter your password, pay close attention to the bottom of the screen and choose Forgot Password? Next, click Next after choosing the Use my secret questions option. To retrieve your password, you must accurately respond to the questions pertaining to your account.

Does Yahoo charge for support?

https://www.helpsolutions.xyz/forum/laptop-notebook-clinic/does-yahoo-charge-for-support