Google isn't making it easy to find the direct studies, but their silly AI summary at the top is pretty direct. "Yes, evidence suggests that trans fats can contribute to food allergies by activating mast cells, altering the gut microbiome, and promoting an inflammatory response."
You can argue that this is only in a mouse model. And fair, but evidence is still there that they can directly lead to food allergies.
Do we have direct causal links to children food allergies? No, but nor do we have direct causal evidence for early exposure. My prior is still that people are better at managing their dietary intake when the problem ingredient is literally removed from the ecosystem than when they are just advised to do better.
https://www.thelancet.com/journals/lancet/article/PIIS0140-6... is an older study that supports this pretty directly. Is a big part of why they were removed from the "safe" category in 2015.