reactjs – Azure AD B2C Impersonation flow in React

I am totally new to Azure, and I have to implement OAuth 2.0 in my React application.

I am using Azure AD B2C as per our requirements and using these 2 libraries in react @azure/msal-browser
@azure/msal-react.

I have registered the SPA Application and used the default Sign In Sign UP flow.

But our application has On-Behalf-Of (Impersonation) feature where Super Admin can access every account to help them with their concerns, and there are few user management/sub-account feature too where users can access the account which are under them.

According to some documents I have to use custom flow and use this impersonation flow

But I did not find any documentation on how to use this flow in the React app.

All the documents I find are either incomplete or confusing.

FYI I have a node server which use to handle the authentication until now before the OAuth setup