Because there is no marriage in Heaven, so thus it is “death till you part” because marriage isn’t eternal. Doesn’t necessarily mean they won’t know each other, there just isn’t a purpose for marriage in Heaven.
does it say that in your holy book, or you just making assumptions? why is there no purpose for marriage in heaven? explain to me the purpose of marriage in your own words. Do people who have been married just go “Fuck it this is eternal now I don’t need to be around you 24/7 I can hang out with anyone now”