If you have lost access to your Gmail account, there are several steps you can take to try to recover it:
Go to the Gmail login page and click on "Forgot Password?".
Follow the prompts to enter your email address or phone number associated with your account.
Enter the last password you remember using for your account. If you don't remember, click on "Try a different question" and answer other security questions or provide other information.
Google will then send a verification code to your recovery email address or phone number. Enter the code on the next screen.
If you don't have access to your recovery email address or phone number, click on "Verify your identity" and follow the prompts to provide additional information, such as your previous password, answers to security questions, or a backup email address.
Once you've verified your identity, you can reset your password and regain access to your Gmail account.