Are you saying thst the yellow flowers are not setting?
no tiny tomato when the petals die?

I give mine a light overhead spray of water to help them set , morning is best and not when the sun is on them.
But they are still young and probably only have their first truss anyway
early days yet.....

Ive watered mine plenty, I planted them b4 the last freeze. Ive seen alot smaller with little tomatos on them. Have u ever heard if of a old saying bout the moon and them just making flowers?? ?

Watering isn't the same as light overhead spraying though - try that as well.