Multiple https port

Hi, im new in ingress gateway.
I have a 3 apps with 3 https port 9001 9002 9003
And i need expose they from kubernetes
I have internal nginx with http proxypass to my 3 endpoints.
What i need to do for reverse proxy to my nginx with Istio?
I need a url https://exmple.com:9001 https://exmple.com:9002 https://exmple.com:9003
Thx for any helps.