Hmm, so I am thinking Enzoani is the designer of this dress. Enzoani has a specific style and I believe I've seen this dress on their site before. If not, the model's Instagram name is kendallhuibregtse. I only noticed the preset on the photos because she is famous and models tons of dresses lol! I would try searching her instagram as a last resort because she tags the designers of whatever dress she's wearing in each of the photos she posts. If not, try to search cheap wedding dresses and try to find similar styles. Good luck!
So I just peeked through Enzoani's website and didn't find this exact dress (but check back behind me in all of their collections, but especially blue because it looks like a blue gown) BUT I did find two very similar. I'll link them below! https://www.enzoani.com/en/collections/blue-by-enzoani/neda