Prevent users from executing pg_dump against tables

Hello all,

In our production db infrastructure, we have one read_only role which has read privileges against all tables in schema A.

We are planning to grant this role to some developers for viewing the data, but also I want to limit the users from executing statements like copy or using pg_dump. Main reason being I don't want the data to be copied from the database to their local machines.

I tried by implementing triggers, but was not able to figure out a way to restrict the pg_dump and allow only select statements.

Postgresql version - 12

Ec2 based postgres database 

Is there a way to implement this? Please advise.