Hi Lebron,
Create a page with a datagrid and pick the train table as your data source.
How to export a new table on the web to Postgresql through Database Replication?
I do wonder why you do use the database rep. module.
If you use it, handling the imported data in your Mendix app is 100% the same as when you have a standalone Mx App. Consuming only its own database. Showing data in a page = connecting the data/context widget to the related Entity/attribute(s). Handling data in you Microflow is revering to the related Entities for your inputs, changes, commits, retrieves etc.