How can I recover my old Apple ID?

Unless it has been rendered dormant or deleted by Apple, just sign into it.

Click on this link about 'How to deactivate your Apple ID account' --> https://support.apple.com/HT208503

- See the section about "Can I reactivate my account?"

https://www.apple.com/legal/internet-services/icloud/en/terms.html

VII. B "In addition, Apple may terminate your Account upon 30 days’ prior notice via email to the address associated with your Account if (a) your Account has been inactive for one (1) year; or (b) there is a general discontinuance of the Service or any part thereof."

Click on this link to learn how to 'Sign in with your Apple ID' --> https://support.apple.com/HT204053

'If you can't connect or sign in to iCloud', click here --> https://support.apple.com/HT203512

For official Apple Support click here --> https://support.apple.com/choose-country-region Select your country, then a product. If you don't see one that handles your issue then keep experimenting with selections until you reach one that gets you a chat session or a telephone call and get the representative to redirect you.

or:

Contact Apple for support and service --> "See a list of Apple phone numbers around the world."

Click here --> https://support.apple.com/HT201232