"relevant challenges" is correct and usable in written English.
You can use it when referring to particular challenges that are related to a certain topic or issue. For example, "Climate change is a pressing issue that presents relevant challenges to governments around the world."
The team selects the most relevant challenges to be put forth to the students for selection.
The building materials industry is facing relevant challenges in terms of sustainability requirements.
This article examines the most relevant challenges inherent to clinical research in these populations.
Examines globally relevant challenges of adequately and effectively attending to public sector responsibilities for basic services with limited resources.
Ultimately, however, and as we are increasingly finding, many such approaches are found wanting – in that they fail to measure up to the nature and scale of the relevant challenges.
As such, you study relevant challenges and learn critical problem-solving methods along with a study of concepts and useful tools with cases, projects, and presentations.
In these contexts, assessing the architectural model as early as possible becomes a relevant challenge.
The development of novel DNN structures, which has good mapping capability, is a relevant challenge being addressed in this paper.
Visualization and monitoring indicators design is an actual and relevant challenge to provide intuitive, clear and direct understanding of large datasets.
Counterintuitive outcomes like these, besides being practically relevant, challenge and eventually lead to refinement of theories concerning fundamental principles of brain plasticity and learning.
Targeted delivery of therapeutic transgenes into specific cells remains a highly relevant challenge for tissue engineering and future gene-based therapies.
