If the profile only requires confirmation by phone number, is there any other way?
Do you have a passkey or opened your account on another device? This will help you to login to your account on a new device without phone confirmation.
I know you do not have one, but those are the ways to log in to the accounts.
Open Facebook, click on forgot password, (try to do it with the device you recently used to access your profile). It will ask you to verify via number but check if there is any option like "try another way", if this option was there, click on it and see is there email present there or not, if yes, then it's good, if not then do not make multiple appeals and login attempt to your account.
Trusted Contact Option: If you have set up this option, there is a hope, open Facebook and click on forgotten account and you will see this option if you activated it before.
Last but not least: You do not have access to your phone number, check if that number is active and make a call to check if the number is active, and request the owner to share OTP with you (seems easy, but people won't trust).