Hi Bethany! My name is Darhyl and I’d be more than happy to help you with your query.
I'm sorry you are experiencing this with your Epic Games account.
Unfortunately, Microsoft Xbox does not have any tools to manage any 3rd party accounts such as Epic Games, Ubisoft, Riot Games, etc.
Try to recover your Epic Games account using the same email as your Xbox account according to the official Epic Games website: https://www.epicgames.com/help/en-US/epic-accounts-c5719348850459/account-security-c5719366891291/how-to-reset-your-epic-games-password-if-you-can-t-log-in-to-your-account-a5720262609563
"To start the password reset process, click here. https://www.epicgames.com/id/login/forgot-password
Enter the email associated with your account in the Email Address field.
Click Send Email.
You’ll receive an email with instructions on how to reset your password.
In the password reset email, click Reset Password, or copy and paste the link into your browser to go to the page. You will be directed to a webpage to choose a new password.
A RESET YOUR PASSWORD pop-up displays.
Enter a new password into the New Password field.
Note: The password must have more than seven characters, including at least one number, at least one letter, and no spaces.
Enter the same password in the Verify New Password field.
Click Reset Password.
This will update your password and sign you in!
You will also receive a confirmation email about the successful password change."
If it doesn't work, it would be best to reach out directly to Epic Games Support for further assistance as they have the tools and resources to properly investigate this case:
https://www.epicgames.com/help/en-US/contact-us
Note/Disclaimer: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.
Thank you for your kindness and understanding! Please feel free to let me know if you need anything else.
Best Regards,
Darhyl
