Q.Yellow Squash/Tomatoes
The squash are getting about 1 inch long and then they seem to stop growing. Why? Tomato plants are large and beautiful, not much fruit on some and not much new on others, ripening slowly. Why?

Certified GKH Gardening Expert
This is often due to poor pollination. Here is an article or two that you may find helpful: https://www.gardeningknowhow.com/edible/vegetables/squash/pollinate-squash-by-hand.htm
https://www.gardeningknowhow.com/edible/vegetables/tomato/pollinate-tomatoes.htm