Sometimes the caps of mushrooms look bizarre and wonky when they’re little and starting to emerge. As they grow, if there’s not enough oxygen or moisture, the mushrooms can deform. Leggy, stringy, or sparse mushrooms need more airflow; let 'em breathe! Try moving them to a more open place or put a fan near them.
Mushrooms that are otherwise abnormally shaped may need some more humidity - you can try using a humidity tent. Take a trash bag or other loose-fitting plastic bag and put plenty of 1/2 inch holes in it. Your mushrooms need to breathe! Drape the bag over your kit and mist the inside of the tent or the slice on your block at least once per day. When you start to see baby mushrooms form (pinning), you can remove the bag and keep misting the block.
When lion's mane starts to yellow it's usually a moisture issue. They can easily get water logged if they're sprayed directly. Try spritzing from further away to give them a mist instead of a soaking. Alternatively, if they're yellowing and not soggy, its likely they're a little past peak maturity. Time to harvest and reset your kit for another fruiting!
Caps that are pale likely need more natural light. Avoid keeping your kit in closets or cabinets. Ambient sunlight helps them develop rich hues.