Q.Camellia trees/bush
What’s eating holes in all the leaves?

Scale pests are the most common, but it could be other pests.
Spray the plant with Neem Oil, it will take care of most pests and is safe for people, pets and bees.
https://www.gardeningknowhow.com/ornamental/flowers/camellia/identifying-and-fixing-problems-with-camellias.htm
https://www.gardeningknowhow.com/plant-problems/pests/insects/control-plant-scale.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm