Phantom doesn’t support restoring a wallet from an iCloud or Google Drive backup. Those backups can restore the Phantom app, but they don’t restore wallet access.
To restore access, you’ll need the credentials used to create the wallet.
If you created your wallet with an Apple or Google account
Restore access by signing in again with the same email and your 4-digit PIN. If you previously exported the recovery phrase for this wallet, you can also import it instead.
See Migrate Phantom to a new phone for details.
If you created your wallet with a recovery phrase
Restore access by importing the same recovery phrase.
See Migrate Phantom to a new phone for details.