Leaves have always looked like this. Can someone h...

Hi, i see no big probem in your grow. maybe the lights were to close to the plants, for me it looks like a lightburn. If i look at the pictures i see plants with very close nodes.. that means the light is to heavy/ to near to them they are dwarfing.
And dong trianing on autos depends on the strain you grow. Most of them respond very well to LST. Its always a good tool in automatics. Solutions: dimm or rise the lights.. they are very heavy.. you will see in days, that your plant begin to stretch.
After stretching start some LST. You can do Lst until second week of flowering, after that point its to late. If you are unsure, just let them grow and do LSt in your next grow if you are used to your setup. Feel free to look into my diaries( ive grown a lot automatics last year) happy growing

Your plants are looking very healthy. I’m seeing that slight yellowing between the veins but that is fine. As far as training autoflowers you want to use low stress training techniques. I would advise against topping, super cropping, and splitting. These would be to much stress on an auto and would cause it to not heal properly in time. The other plants that are lagging behind are fine as well. This is normal as when growing with seeds each plant can have slightly different characteristics. We refer to these differences as phenotypes. If you want consistent growth it’s best to use and take clones. However I would again advise against taking clones from an auto. Hope this helped and if you have any other questions feel free to DM me.