We can use Train.csv data to train model or we use train.csv model to get sentinel data and then train our model on this data as given in starter notebook You can see my stater notebook for this purpose https://www.kaggle.com/code/muhammadqasimshabbir/zindi-telangana-crop-health-challenge and https://www.kaggle.com/code/muhammadqasimshabbir/teleghanhealthearthenginedatatraining respectively for train.csv and for donwload sentinel data and then train on it

You can use both i think