Connect Neo4j to Google Colab from local Linux Machine

Hie, I am trying to connect my Neo4j server version 4.3.2 (community) running in Linux to Google Colab. I am not able to do that, it says "ServiceUnavailable". Is there a way?

My host is "host = 'bolt://<my_public_ip>:7687'"

Thanks in advance.

If anyone has this query, there are something called Neo4j Sandbox, it's easy and straight forward approach.