Q.tomato truss support
Do you need to support the tomato truss when the tomatoes are getting bigger so that they don’t snap the truss stem?

In some cases, yes, especially where the fruit can become quite heavy on larger tomato varieties. You can minimize the burden of weight on the trusses and help hold them up by using truss ties and clips. Clips extend from the truss to the tomato plant's main stem or latch onto another support structure such as a tomato cage.