Thank you for your response.
Having researched this topic quite a bit, I was surprised to find that there was no clear conventional solution for native apps authentication.
Returning AWSELBAuthSessionCookie cession id cookie from the WebView to Swift, could potentially be a solution, but even if it works, it feels like a hack. Auth0’s SDK clearly does not intend such use.
If I understand correctly, the intended design by Auth0 is that after the AuthN flow you get a JWT id token on the client, and then you add it to every request and validate it server side. Which AWS ALB does not do, so my already working AuthN setup would need to be thrown out.
I’m exploring API Gateway options (AWS one did not look too appealing)…