This Zenodo submission publication is a report on the current scenario of data hubs across Europe managing health data and their compliance with the FAIR (Findable, Accessible, Interoperable, and Reusable) principles. The report is part of the HealthyCloud WP4 project, which focuses on how health data is managed by the data hubs. The report aims to explore the discoverability mechanisms provided by data hubs and analyze their compliance with the FAIR principles. The report analyzes the survey responses related to the FAIR principles, including stratification of the results, to generate a set of best practices for enabling discoverability of data collections within a data hub at different FAIRness levels. The report also provides a set of best practices on how newly created data hubs can become part of the future European Health Research and Innovation Cloud ecosystem. The report includes a detailed definition for a health data hub in the HealthyCloud project, which plays an essential role in enabling the promised advantages by the FAIR principles. Overall, this report provides valuable insights into the current scenario of data hubs managing health data and their compliance with the FAIR principles, as well as best practices for enabling discoverability and increasing the FAIRness level of data collections.