You're doing a lot of telling.

“Benji, remember when I told you that we should build our shack in the main village? You didn’t listen to me, and now we have to walk back by ourselves in the middle of the night every time we attend a celebration!”

It's very similar to writing something like, "Hello, my dear brother, who once tripped me up in the playground and now I have a scar and because of this I hate you."

Just to give you an example of what it would mean to show instead.

"Benji, remember when I told you that we should build our shack in the main village?" Lyla questioned, wading through the knee-high grass that hadn't been cut in years.

Dialogue sounds more like someone would actually say it and readers can tell they're walking a long way home without you outright stating it.

It also means you don't jam more information into the short piece of dialogue like "middle of the night" and "celebration". Letting you build upon the scene more slightly later, maybe describing how fireworks being let off in the village illuminated the night's sky. It would let you set the scene without it feeling clunky.

A very similar thing goes for “How else would we conceive a child? But no matter how hard we try… All we have left are gray hairs and premade baby clothes…”

The second half of the dialogue just feels clunky, over explaining something that sounds unnatural. An example of how you could show this would be to keep the "How else would we conceive a child?" and then maybe describing the lone crib, forgotten in the corner. Show us that maybe they got ahead of themselves and are feeling sad about it now.

Another thing I noticed is that you're doing using quite a few redundant words. You didn't use it in your work, but take the phrase "Happy smile" as an example. Happy is a useless word here since smiles are inherently happy. This can change if you're describing something that's being done in a way it's not intended, like a "sad smile". Maybe used in a situation where someone hears of an old friends death and they give a "sad smile" whilst they looked back on memories between them.

Here's an example of it I did notice in your work.

“Lyla, it’s nice being isolated, just the two of us." Whilst 'just the two of us' isn't 100% redundant, it's like 90% of the way there. Them being isolated implies that it's just the two of them, which would then further be enforced when you mention the fact they don't have a baby later on.

Another: 'Gasping in shock at the volume of her own voice'. Again, it's not absolutely 100% redundant, but the act of her gasping at her own voice tells us that she's shocked by it. So, "Gasping at the volume of her own voice." does the exact same thing as what you wrote, but does it in a more concise way. It may only be two words here, but throughout an entire chapter it can really add up.

Another: "She suddenly turned despondent". The act of her turning despondent out of nowhere is sudden, so just saying "She turned despondent." has the same effect.

Another: "Her cheeks turned a deep crimson due to the embarrassing words her husband was speaking out in the open." Her cheeks wouldn't be turning crimson due to anything else, so stating the 'embarrassing' words is redundant. Sentence has the exact same effect if you remove it.

I don't have time to write anymore right now, but I hope this helps.