Single Sign-On with SAML on Sisense end and OIDC on SPA React application

I have a question regarding Single sign on setup. I want to embed Sisense dashboards into my SPA web app.

I have implement authentication in Sisense using SAML with okta and authenticating my spa webapp using OIDC. now my question is how SSO would work or i can achieve SSO , if The flow I want is:

User will be login to web app it will be authenticated via okta. I want my user to see Sisense dashboards in iframe into my web app that they will not have to login to Sisense as well to see Sisense embedded dashboards into web app.