Overall I think your plants look good. The brownish fringes on the top plant leaf may just be an isolated defect or due to a recent brief stress. Best guess.

What type of lights are you using and how close are they to the light source?

When leaf tips or margins abnormally curl/cup upward, it's usually an indication the plant is trying to retain moisture – most common causes are dry soils or high temps; or, if you are using supplemental lighting, the lights might be too close.

When leaf margins curl down, especially if leaves droop abnormally from the base of the leaf to the leaf tip, there is probably an issue affecting root function or health. The main causal suspects would be over-watering or soil compaction causing an inadequate supply of oxygen to roots, a root infection, or a TDS (fertility) level too high, which can limit water uptake.

Al