If her story is true, she lost at least 80 kg (175 lbs), over 60% of her weight.
Of course she would have a bunch of excess skin, so naturally she would have a tummy tuck to look normal again. She cares about her looks and has the means. This in itself is not in indicative of WLS.
If anything, this supports that her photos would be in chronological order from small to bigger, as you typically wait with removing skin until you reach target weight.
I think 48 kg sounds about right in the first pic, when comparing how she looked back in 2016. She is quite short, 160 cm (convert to freedom units yourself 😉).
If she had WLS, gaining almost 30 kg in 4-5 months would be impossible.
Can’t know for sure, but I see nothing that contradicts her story here. I want to believe 😁