I’m not sure whether during the data collection include the consent from the patient to reveal their data for future research or not? If there were any consent to use their data for future research, it is ethical to give the data that matched to the consent that obtains before collecting data. But if you did not receive the consent before collection, you cannot provide the data to the research team.
If you think this research will have positive impacts on treatment of this disease. After the project is approved by the ethics committee, you can help them by providing the national database in the area of their interest and then the research team contacts the patient directly to obtain the consent before use patient’s data.