In case of having multiple APIGWs, is there a way to have unified analytics across them

Dears,

In case of having multiple APIGWs, is there a way to have unified analytics across them ?

It depends a bit on your deployment setup.
You can cluster the API Gateways by running terracotta. You’ll need to cluster Terracotta and Elastic Search of each API Gateway.

https://documentation.softwareag.com/webmethods/compendiums/v10-11/C_API_Management/index.html#page/api-mgmt-comp/gtw_configure_cluster.html

https://documentation.softwareag.com/webmethods/compendiums/v10-5/C_API_Management/index.html#page/api-mgmt-comp/co-nodes_clusters.html

Hi, In case cluster APIGs are not available suppose 3 APIGW availalbe and i need to get all of them

It is possible. See this reference and the sample picture that describes API GW in two different zone. This can ideally be inside a single zone as different GW servers or GW clusters with unified analytics.