If I’m out somewhere I’ll quite often have the veggie mezze board, meant as a sharing starter, for my main meal.
Quite a few places now offer starters as ‘small plates’ with a cheaper price for ordering 3, a sort of tapas. As a previous pp said, I do this with an Indian takeaway sometimes (and occasionally also in a restaurant)
Also something like fish cakes, I’ll ask for it on a large plate with new potatoes or chips.
And yes, soup and bread is lunch, too much before a main course. As are most starters which is why they are better eaten tapas style.