One thing that ties Cole and Zanab together in a way that the other couples in Season 3 aren’t is their shared religion. When they agree in the pods that they’re both looking for someone with a similar Christian faith and someone to pray with, it’s clear that Cole and Zanab could have a leg up on the others.
Yes, they still have issues, but being able to lean on their faith as they worry about the fate of their relationship could help them both.
Source: https://www.distractify.com/p/cole-and-zanab-love-is-blind-still-together