Anyone know what this could be

Mg excess and Ca,P lock ps u can think that's N excess so we'll see u next week with new question

Looks like N toxicity + low VPD bro. Homemade soil mixes can be strong early. Let her dry out, no feeding, warm nights if you can, and boost airflow. She’ll recover once the environment’s dialed in 👊

Nitrogen, in excess. Plus i think you grow either in very hot and humid environment with soaked pots, or too dry environment and soaked pots. By wrinkle looks like first option + nitrogen. Reduce feeding a bit and/or double check environment, aka vpd.