Sharing session between desktop native app and SPA

We have 2 applications

  1. Native Desktop App - Login using OpenID Connect Native SSO
  2. SPA - hosted in AWS and uses okta-angular / okta-sigin-widget for user authentication

The end user will be authenticated in the desktop app. I want to open the SPA in the embedded browser of the desktop App without the user to go through the sign in again. Any suggestions or pointers how to implement this ?