How to setup a web app on a remote customer's Okta dashboard that works with our existing nodejs web site using JWTs?

In exploring the community, I found this post which could be relevant and be what I’m looking for. I’m evaluating the steps I took to see if I used the wrong redirect URL and need to instead use one that points at the SAML path:

https://community.auth0.com/t/saml-setup-okta-as-idp-and-auth0-as-sp/91164