Genetics, lighting or no problem at all?

Wondering why the smaller inner leaves are taking a while to develop. Anything looking wrong here?

1. Patience
2. What are your temps? Either it's cold in there, or you're lacking phosphorus.

Temps are steady 70f @ 40rh which puts me In a good range for seed propagation according to vpd chart

Just curious because this is the plant next to it and was started at the same time and under same conditions. Thanks!!

When were they germinated?

They showed taproot November 4th via paper towel method and then into pellets. Sprouted through on the 5th and have been under light since

They are also auto flowers from fast buds if that matters. Nothing seems wrong, just curious more than anything. Growing so far has been a blast!

Probably fine and putting resources into roots

It's only 4 days old lol it looks fine, I'm curious about the purplish colour in the growing tip.