Yes. The whole point of the set-up - married at first sight - is that you make a commitment to each other, and so you don't have to go through the whole, "do they like me? do they really though?" thing, which can lead to all sorts of insecurities and misunderstandings. You're married, you're past all that.
So you take the time. You get to know each other. You both make an effort to be kind to this stranger, and have someone being kind to you. You find ways of enjoying spending time together, and then you find out that you quite like each other, and, well, things just progress from there.
Even just within the context of the "experiment" they have eight weeks or something together, which is a long time to get to know someone when you spend every day together. There's no rush! Take your time. Be nice.
I think if I was in this experiment I'd be such a bundle of nerves for at least the first week that I wouldn't be able to tell whether I fancied the other person at all. But they're all desperate to leap to judgements straight away. It's mental.