Hello @yashrajmandloi2,
Our Angular SDK uses OpenID Connect: Sign in to your SPA with the embedded Okta Sign-In Widget | Okta Developer and that is the configuration we support at Okta.
That said, it is possible to configure Angular to use SAML, but you will need to set up a Back End to handle the SAML Assertions. There is some discussion of this here: Angular with SAML - #4 by pchh as well as here: How to integrate Okta SignIn widget and SAML SSO with a Angularjs SPA? - Stack Overflow that you can use for ideas on how to set this up.