@Prakash Unfortunately only Premium Plan are currently supported as mentioned in github document and Announcement page.
DISCLAIMER: This library is supported in the Premium Plan along with support for scaling as Go-Live - supported in Production with a SLA. It is also fully supported when using Azure Functions on Kubernetes where scaling will be handed by KEDA - scaling based on Kafka queue length. It is currently not supported on the Consumption plan (there will be no scale from zero) - this is something the Azure Functions team is still working on.
If you want to trigger function when there is a new message and consume the message, you may consider to send messages to a supported source (e.g. Azure Event Hubs) and configure Functions to listen to that source. Please refer to this document.