As per my understanding, you need guidance about an Azure product that you can use to expose different applications that are running on different AKS clusters which are in the same region on the same host name but different paths, so you are interested in path-based routing.
For that, you can use an Application Gateway, which is a regional product. This is the link on how to create an Application Gateway with path-based routing rules: https://learn.microsoft.com/en-us/azure/application-gateway/create-url-route-portal
You may also take in consideration Azure Front Door, which is a global product. Useful links:
I hope this is helpful. If any clarification needed, let me know and I will do my best to answer.
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