Have you checked soil ppm before transplanting? Do you feed them? Many questions to ask. Possibly you can save them with extreme flush, like 15L per plant with 200 ppm solution, and 3% hydrogen peroxide 3ml/l. Peroxide will prevent drowning while you flush them hard. But it’s surely better to start over with new seeds, and watering them properly. The whole pot must be moist after you water them. Time loss will be minimal comparing to trying to save them. But if you really want to help these poor babies, do the flush, measure ppm and pH. Read some articles about feeding cannabis seedlings. Good luck!