Indeed focus and specialisation will help you to get job faster, especially if you are in the begin of journey. You have to match your skill with company requirements. Don’t be like typical foreign engineer with CV that covers all possible tools and technologies and you barely used it.

Think about plumber and electrician, they have the focus and they know what type of job they need and it simplifies the hire process.

Data jobs are the same, you need to be expert in one thing and highlight in CV or during interviews.

For example, data engineer - focus on storage and data processing.

BI engineer, focus on BI tools (1-2), excellent SQL and communication with business stakeholders as well as ways of delivery insights to the business.

And so on.