Hi Irem,
Thanks for your message.
Burp Suite Enterprise Edition does not feature native 2FA for user login but does support SAML integration.
2FA could be configured within the SAML identity provider settings for login to Burp Enterprise. This would depend on your SAML identity provider. For example, Okta supports this.
SAML integration guide is below for reference. Please let us know if you have any further questions.
https://portswigger.net/burp/documentation/enterprise/managing-users-and-permissions/sso/saml