no berries

Question

I planted about 6 elderberry bushes, and 2 have fruit on them and the rest do not. They get sun through out the day. The 2 that produces berries are on the end, the others behind them.

That also have little bug bites. They are 4 years old.

Answer 1

You may want to start with a soil test; this will let you know if you can make some soil amendments to fix the issue.
Your County Extension Office can help you with this.

https://www.gardeningknowhow.com/extension-search

Neem Oil is a good treatment for pest issues.

https://www.gardeningknowhow.com/edible/fruits/elderberry/planting-elderberry.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm