It's a typical case when you have many accounts in your old wallet and plan to import them all to the Temple wallet. How to do this?
Option 1: Create Account via your Seed phrase
By default, when you use you seed phrase, the Temple wallet restores just the first account in your old accounts list. In case you need to get access to all accounts, use the "Create account" button. By adding new accounts, you will restore all your old accounts created by using your seed phrase.
Option 2: Use private keys
You may add each account separately if you have separate private keys.
Click the Robot icon and choose the Import account, after write your private key and click import account.
Option 3: Add multiple accounts from the Ledger.
Click connect Ledger and choose Account number that you want to connect.