Integrating Auth0 between different framework platforms

I have a Webflow application (Static site) that involves a checkout and works just fine. I am trying to add Auth0 as the authentication layer to the checkout. Checkout is a bunch of React scripts that I’ve bundled up using Webpack and I also have the Auth0 logic implemented on there.

The problem is, I am unable to use the Login information from Auth0 on the Webflow app. When I login via the injected react scripts to Auth0, I get redirected to the location.origin (which is a full static page). But I need the authentication information on the checkout page. Is there a way I can seamlessly wor through both applications?