Does Azure Logic Apps (Standard) support receiving messages from Service Bus subscriptions with sessions enabled?
I have tested the "When messages are available in a topic subscription" trigger in Logic Apps (standard)
The trigger doesn't fire if the subscription is session based, but does fire if it is not - my conclusion is that the connector doesn't yet support this for the "standard" flavour logc app.
You can built service bus trigger and using session handling in Logic app(Standard) here.
Please refer the below link for discussion on similar thread :
unable to receive message from Service bus queue (Session Enabled) in Logic apps| MS Q&A.