Please check the list of supported datatypes by Postgres connector
As a immediate workaround , we can use the JDBC_IC connection type to access these objects in IICS.
how do I get this JDBC_IC driver?
If you meant getting this connector in IICS, please check with your admin or Informatica support to get it available in your organization. If you meant JDBC driver, it should be available from the concerned Database vendor.
I hope you've gone this documentation on the JDBC connection as well.
Either you can create Shipping ticket or navigate to Administrator --> Add-on connectors and add the connector(this cannot be done in sub org)