Times have changed, there is no such thing as a “standard wedding”, no such thing as a “standard wedding dress” and, in addition, as you cite here, men can marry men and women can marry women 🌈.
I have been to 2 gay weddings, one male, one female. The male one was very flamboyant and colourful to the extreme, the women’s one more sombre, with both brides in long dresses
So, l think the dress depends on the type of wedding. If you are a guest talk to those getting married. If it’s your wedding, it’s your day. Go for what you want.