Are these black tie?

I’m going to a wedding in a month and am super stressed about the black tie dress code! It’s at a super fancy waterfront venue and unfortunately I don’t know any of the girls going so I can’t ask for their advice. Do all/some these dresses fit the bill? Which do you suggest? What even is black tie lol?

I’m second guessing all my choices. There’s no specific colour scheme.

Would also love suggestions for where I can shop. My only requirement is that there needs to be a physical store 🙏