I think I may pinch out the top trusses and let the energy go to the others lower down the plants.
I'm not sure you'll have to take trusses off that have already set, but I'd pinch out the growing tips on all tomato plants. I stopped mine off about 10 days ago. But I have got a bumper amount of green plum tomatoes on the bush ones so I thought better to stop the tops to pump the energy into ripening the fruit 🍅😀