Plus if you look at Nayla's feed half her clothes are cutting her in half. So she might be wearing a 18-20 but that's not her size
I just did and omg the girl squeezes herself into her 3-sizes-too-small clothes as much as Carys does
looks like she will burst out of them if she breathes out... body positivity my ass, she is clearly lying about her size, just like Carys!
Also... how positive is Nayla going to be when she gets diagnosed with diabetes or any other complications? You can pretend that 'bodies come in all shapes and sizes' as much as you want, but facts don't care about feelings and promoting obesity won't protect you against the consequences of it. Her weight is a major health risk, whether she accepts that or not.
If she doesn't cut the crap and change her lifestyle, she's in for a future of diabetes and heart disease - no matter how much she 'loves' her body, it's very unhealthy.
Same goes for Carys - if she keeps eating this way (the constant sugary drinks, large amounts of pasta, chocolates and mukbangs) she will keep putting on weight and go down the same road.