Ref: CHC210545 MetaMask allows its customers to access the wallet via its browser extension and mobile app. You can use the wallet on your mobile or computer or a separate device. Once you access the wallet, you remain logged in until you delete the app or extension from your device. You may also lose access to your MetaMask login account in case your device has been stolen or broken. In such a situation, you may lose access to your wallet account. To fix this issue, you need to follow the path to restore your wallet.
More details: Metamask Login