The plants are in day 9 and its seems to me that they grow slowly , also , one of them getting yellow in his leave.
Just watering them without fertilizer.
Each picture is a different plant
Literally what maxgrowcanada said it’s a case of over watering! Just either feed her 10-20ml a day and spray her and the top soil daily maybe even twice! I find covering with a clear plastic cup does the trick as keeps the moisture in and around the seedling! Just leave them a day or so and they’ll spring into action