Are you using the Okta Spring Boot starter like this tutorial uses? I ask because the properties you mention are for raw Spring Security without our starter. Even if you use our starter, these properties will still work.
Because of this, I don’t think your app resembles this tutorial since this example packages everything together in a single JAR. I’d like to help you figure things out, but I feel like the problem is on the React side and, therefore, not the same as this tutorial. This tutorial does all the authentication on the Spring Boot side.