Srikar Mahankali Thanks for posting your question in Microsoft Q&A. From the description above, you are using Standard pricing tier and I assume you followed https://github.com/Azure-Samples/spring-petclinic-microservices sample in implementing microservices as well as spring cloud gateway.
If so, you need to configure application with
spring.cloud.gateway.globalcors.corsConfiguration to allow CORS requests to the gateway and refer https://github.com/microsoft/azure-spring-apps-training/blob/master/08-build-a-spring-cloud-gateway/README.md#configure-the-application tutorial for detailed instructions.
In the pet clinic sample, add the
CORS properties in https://github.com/Azure-Samples/spring-petclinic-microservices/blob/azure/spring-petclinic-api-gateway/src/main/resources/application.yml to allow public URL of the front-end application.
I hope this helps and let me know if any questions.
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