Reaching running application in minikube at 'localhost' on Linux
After short investigation it seems to me there is a wide problem related to minikube, --vm-driver=docker and ingress. And it seems it affects all the platforms, not only your specific case.
There are 2 open issues on github related to this. Both are fresh and opened:
1. Ingress on docker driver - minikube 1.16 - ERR_CONNECTION_REFUSED
2. docker: Ingress not exposed on MacOS
Are you able to use another --vm-driver?