Okta auth server + custom user management

We are using Okta auth server in our organization. Okta for single sign on and we have
internal product that has custom user management. We are facing issue on how to authenticate from single sign and also have a check in User Mgmt REST endpoint micro service . The user mgmt service looksup the user and gets the roles and permissions.
we cannot use okta user mgmt , it is a legacy product. The roles and permissions are required to show some menu and restricts within menu read,write or update.
we are using angular 11 PKCE flow and spring boot micro services in AWS EKS.
let me know if the okta has some kind of MultiFactor Authentications that allows to call
custom authentication endpoint and use those results and add them in okta access token or refresh token or custom token. so that microservices can use token to validate