AWS Glue Cross Account Not working

Running into a time out issue on below scenario

Trying to establish Glue connection from Account B (where my Glue crawler and catalog is) to Account A (Ec2 SQL Server) . Requirement is to pull all the data and write it back to Account B (Aurora PostgreSQL). I am able to do telnet connection, JDBC connection (using SQL CMD) by launching an EC2 bation host in same VPC,SUBNET,SECURITY GROUP of Glue job (Account B) to account A and can query sql server with no issues but when I do the same through GLUE Connection , I am getting timeout error. No restrictions on NACL,FW etc. Question : 1.Glue under the hood, creates ENI and establishes connection. In all the Glue documentation , I see references for "VPC Peering" for cross accounts and no where Transist Gateway is mentioned. In my customer environment Transist Gateway is being used. I doubt if this will be even an issue. just want to rule that out , if anybody has any idea, pls let me know. 2.What else could be wrong , when JDBC is working ?