Hello @Madala, Hanumantharao , as per : https://learn.microsoft.com/en-us/azure/logic-apps/connect-virtual-network-vnet-isolated-environment#create-subnet
are needed to create and deploy resources in your ISE and are used by internal Logic Apps components, such as connectors and caching for performance.
Is there any specific reason or requirement for which you need more details? If yes, could you please share the requirement?