If some accounts are missing after importing or restoring your wallet in Phantom, it usually means Phantom didn't automatically add every account.
To add accounts manually, select your profile avatar in the upper left → Add Account → Create New Account → Create. Repeat until your expected accounts appear.
If your accounts still don't appear, you may be using a different Secret Recovery Phrase than expected. For more details based on how you created your wallet (recovery phrase, Google/Apple, private key, or Ledger), see Fix issues importing or restoring a wallet in Phantom.