IdP initiated flow with Okta and Firebase

I have set up my SAML integration between Okta and Firebase Authentication. This works perfectly for a SP-initiated flow (aka. user goes to my website and clicks on “Sign in with Okta”)

Is there a way to initiated the process from Okta?
So far I haven’t been able to redirect a user to my home page once they click on my Okta app from their dashboard.