I'm certain the lack of tights is that Meghan is from California, and that's just not really a tights place. She's also got the most terrific colouring, so there's no point her even wearing a sheer tight. Am really not surprised she's resisting tights! Also, the time she wore tights at a Buckingham Palace Garden Party there were columns devoted to the topic.
Hairwise, she probably has a keratin treatment on the roots, they're much milder now and it wouldn't harm the baby. Also, it's just the regrowth that would need doing, not the entirety. I have similar hair and this is how I manage mine.
(I used to be a personal shopper for a very high-end fashion boutique so do like to think I know what I'm talking about when it comes to clothes and style. I'm not American, London-based and hate tights with a passion. I refuse to wear them and happily wear skirts during the winter).