I keep hoping they will add a way to redo any battlepass for chapters that you’ve missed. I didn’t even know Conan was a thing until a friend gifted it to me last Christmas, so I missed Age of Sorcery Chapter 1 which was a great BP and had some really nice stuff.
I’d be fine playing through the challenges and having to earn my way through it; I’d be fine even doing all of that and not getting the Crom Coins that come as part of it. That way, the coins are a reward for playing during the chapter but people that come in late don’t miss out on all the other stuff, especially because BP/BLP stuff is account bound so you can’t even share with friends who start later unlike DLC stuff.