To recover your (MEW) account, you'll need the original access credentials. Use your private key, keystore file, or mnemonic phrase to regain access. Open the MEW interface, select the recovery method, and securely input your details. If you've lost access to these, recovery may not be possible, so always store your credentials in a secure location.
https://deficryptowallets.com/recover-mew-wallet/

Recover Your MyEtherWallet (MEW): What You Need to Know
deficryptowallets.com

Recover Your MyEtherWallet (MEW): What You Need to Know

Learn how to recover your MyEtherWallet (MEW) account with detailed steps for using a private key, recovery phrase, or keystore file.