https://winteriscoming.net/2021/11/22/the-wheel-of-time-boss-explains-big-change-perrin/
But yes, it's a mix of they've aged the characters up so that the audience skew it as a "young adult show" and not watch it.
Which means some shifts to adapt to characters being 18-20 rather than 16 or so. They've compressed a couple of side characters into one, they've made Mat more grim with a darker family life, and a few other areas.