Spring boot REST API handle authorization code GRANT_TYPE

Question

I have a application consist:

• Web app.
• Oauth2 server.
• Resource server.

Normally, web app send request to Oauth2 server to get access_token then use it to call api from Resource server. This is grant_type: password flow.

As grant_type: authorization_code, web app send redirect to SSO server. If login successfuly, SSO server will redirect to web app with code. Web app will use this code to get access_token from SSO server. In here, i think SSO server and Oauth2 server is one and i config like that.

My issue is i want to custom UI of SSO formLogin(), using angular. So, i create second web app to do it. I think this web app can fetch authorization code from SSO server then check and redirect this code to primary web app then use code to fetch access_token like grant_type: password.

1. Is these possiable?
2. If SSO server additional social login like Google, Facebook.... My SSO server can do that?

Maybe my question is not exactly. So, give me your idea or please show to me what i wrong. Thanks all.