Equivalents of Nginx Ingress Annonations on Istio Ingress Gateway

I’m currently migrating an IT environment from Nginx Ingress Gateway to IstIO Ingress Gateway on Kubernetes. Istio version: 1.11

I need to migrate the following Nginx annotations:

nginx.ingress.kubernetes.io/proxy-buffer-size
nginx.ingress.kubernetes.io/proxy-read-timeout
nginx.ingress.kubernetes.io/proxy-send-timeout
nginx.ingress.kubernetes.io/proxy-body-size
nginx.ingress.kubernetes.io/upstream-vhost