I want to design the Jmix application from doing reverse engineering from existing database. Can somebody help me with example or documentation.
First you should create an additional data store, or change your main data store to point to an existing database.
Then invoke “Generate data model” action in the context menu of this data store in the Jmix tool window.
For reference you can take a look at the documentation of the previous generation of the product: CUBA Studio User Guide
This feature hasn’t changed much since that version.