Multi AZ for Apps using exadata at azure latency issue

Hello, has anyone deployed their application in a region across all 3 AZs and using Exadata at azure  which is in one AZ, and notices a lot of latency between the apps in az1, az3 communicating to exadata in Az2 as an example? MS says inter zone is 1-2 ms but we need to reduce the latency; we tested unizone and results are fine but Microsoft says there is no answer to reduce latency with multi app solution; using one zone or PPG is not our target architecture it’s using the 3 azs ;  anyone have any uses cases like this using exadata; understanding that every application is different but this one is very chatty with its database; thanks