There is no reason to believe there is even an association between diet and Type 1 diabetes. In the absence of evidence for even this basic fact, simply finding a correlation between a whole bunch of foods and Type 1 diabetes seems fraught with all sorts of issues beyond even the fact that the study design can simply find correlations and not causations any ways.
You can also see the biases that the news likes to present. The correlation is not causation proviso is barely mentioned, and most of the article shows it as a causal link and uses the speculation that I may be pesticides to justify this causal link, when it comes to bananas, oats and yoghurt.
However, the last couple of paragraphs which mention the correlation between staying up at night and Type 2 diabetes (a disease where lifestyle factors are known to have a causal effect), the fact that it’s a correlation is mentioned almost immediately and forms the bulk of the reporting.