[Urgent] Tables in my postgresSQL database not being linked to one another

I am using Nocobase for something like CMS.
I have linked my postgres db to it, now I have created many fields in different forms which are related to each other.
When I see the graphical DB interface in the nocobase I see that tables are linked, but when actually see in PG Admin, I see that the tables are not linked with each other.

Is it normal or is there any option to link it?

This is normal, the graphical interface to display relational data tables is a feature developed by NocoBase itself and has nothing to do with PG Admin.
This feature is for demonstration purposes only and does not affect your normal use of NocoBase and PostgreSQL.

The Graphical plugin of nocobase is used to display the relationship between nocobase tables, which relies on the metadata information defined in the nocobase data source manager