Sequence is a smart contract wallet, so there is no "wallet seed" or "recovery phrase" you can import into a wallet like Metamask.
Account recovery is now as simple as ensuring you have access to the email or social account you originally signed up with.
It's impossible to change the social account or email used when signing up, so it's extremely important to use a method that you will always have access to and manage securely.
If you have lost the password to access your account, you can follow the steps on the platform's own recovery tutorial
How to recover your password for your social account login?