I need opinions and suggestions

The ones with paling from bottom up -- needs more N. The burning around margins/serated tips is probably P or K related. Some of your plants look light-stunted, because the growth nodes are way too tight and the plant remained short even later into flower. Rate of growth can be improved by fixing these problems, but also need to fix your substrate. More aeration/drainage amendments. High water capacity mediums should have roughly 50% perlite or vermiculite or similar (by volume). Coco can be 33% perlite because it holds less water per volume than sphagnum peat or the typical constituents of potting "soil." watering habits - water entire volume. A little runoff ensures this. With soilless context you want minumum 10% runoff every time. Wait for top layer to dry and repeat. Feeling weight of the pot is also an excellent trigger to irrigate. If the loss of weight is similar each time, you will need the same volume of water each time, which allows for more efficient mixing of fertilizers with less waste. Do not choose a volume to give. The characteristics of your substrate dictate how much is needed. If you follow the suggestions above, whether you use coco, soil or spagnum peat, the pot will roughly hold the same amount of water when saturated. it'll also have roughly the same amount of 'gas' in the substrate per volume too. This is good for roots as they need some o2. Waiting for top layer to dry will promote deeper roots. When you see more flower development you can increase fertigation frequency a bit, if you want to. Just make sure some minimum weight is lost before doing so. Plant has to drink fast enough relative to pot size to warrant it and avoid any elevated risks from it. Just for fun, start with less light then react to an intentional initial stretch. Slowly adjust light to give more, and when it's controlled, take notes of power/hanging distance/hours of operation. You want to give too much and need a little less. You can always see stunted plants easily because so many leaves are tightly packed together. You don't have an extreme case, but definitly giving a bit too much light at least early on, and they don't snap out of it in tmie. Autoflowers are unforgiving of mistakes made in vegetative phase.