What are the leaves indicating ? I'm a little...

Just looked through the diary, my thoughts are the 24hrs of light has been way to much and stunted them, you have just dialled down to 20hrs which will help, maybe 18hrs would be better. It also looks like you could be on the edge of nitrogen toxicity. I'm not familiar with your nutes but I'd imagine your at a fairly high ppm. If I was you I'd dial the lighting to 18hrs and just water for the next few waterings incase you have a build up in the coco. This is just my opinion and I could be wrong so take other answers into account before acting.

Bottom leaves are damaged from moisture stress (too dry) and the margins pale and go crispy then go necrotic. Also looks slightly high in Nitrogen, watch your levels.

Hey, sorry about your stunted fast buds plants with curled-up distorted leaves. this points straight to their commercially bred autoflowering genetics, which are narrowed and ruderalis-heavy, making them fragile and prone to health issues. Key weaknesses in fast buds genetics is stunted growth from their sensitivity. Ruderalis influence gives small roots and a fixed lifecycle, so minor stresses (transplants, overwatering, whatever) cause permanent stunting. Growers often report "untested" strains leading to runts. Its not a beginner friendly, or something someone wity experience would see as a serious choice to grow. The dark green, curled up leaves signals N excess, amplified by the strain's need for precise nutes and pH. Other genetics like the landraces heirlooms some of us use handle this better without the "princess" demands. Aggressive breeding for speed/yield creates inconsistencies like weak vigor and poor recovery from temp swings or overfeeding like you are witnessing in front of you. Grower feedback on them is mixed reviews highlight stunting in autos they're less forgiving than photos, turning small mistakes into failures like you have there. If you can nurse them along to harvest, it will be much less than it should be, less potent, lower quality. The quick fixx flush suggested makes sense with worthy plants with pH'd water to clear N buildup.... but on what you are growing...whats the point? Its not going to recover that lost vitality before it automatically flower from age. Its already failed and not going to be worth the time and resources. Sorry you got duped by the hype/marketing. Ditch ruderalis hemp hybrid autos for something more robust like proven landrace-heavy classic photos, they're tougher and won't stunt so easily. If you make a mistake you can fix it, let them recover and then send them to flower when you decide. My advice is to put them in the trash/compost and stop wasting more time and money on junk. Get some real cannabis genetics that are worth your investment, and start from there. Quality genetics are the foundation of the grow. Remember that. Tough lesson, but you are wiser now from direct experience. If you want great plants, great weed, dont get the most common cheapest to produce seed. If you need help choosing good genetics, im always up to talk shop. ✂️ cut em down.

hi...... da hast du wohl zu viel gedüngt....... Giesse erst mal nur ph-angepasstes Wasser und und gib der Lady etwas Zeit und Ruhe um sich zu erholen...... Wenn sie wieder fit ist, fange wieder mit dem düngen an😉 Viel Glück

Waaaaaaaay too much feeding, especially nitrogen. You are on the verge of nutrient toxicity.