Your Secret Recovery Phrase has the ability to generate an unlimited number of accounts or wallet addresses. When you import your Secret Recovery Phrase into Phantom you will see a list of all the possible wallet addresses your recovery phrase can generate.
If you have used an address before and it has a SOL balance then you should see those familiar accounts at the top of the list. Select the accounts you'd like to use with Phantom and then click the Import button.
DO NOT share your Secret Recovery Phrase with anyone! If someone has access to your secret phrase, they will have access to your wallet. Phantom support will NEVER ask you for your secret phrase or your private key.