I have a project where I developed dozens of useful queries. Now I
want to deploy the same queries in another new project. is there an
easy way of doing this please?

In the Process Configuration Editor, you have the option to select
queries to share with everyone on the project. This functionality can
also be used for Process Templates. When you then create a new project
based on such a template, the queries will be available to everyone on
the new project.

Note that the ability to transfer queries across projects or
repositories depends on the values that are references by the query:

E.g. a query that references a specific category will not work in
another project area or repository as the category will not exist there

Regards,
Patrick
Jazz Work Item Team

Thanks for your feedback!

I tried the Predefined Queries in the Process Configuration.

It seems the queries are changed after they are deployed as Predefined Queries.