white tiny ? all over the bark of numerous trees
The cherry laurels have white prunicola scale, a sucking insect. Here is information and mangement: https://extension.umd.edu/hgic/topics/armored-hard-scale-trees-and-shrubs
The tree trunk is showing scale also, but it may be a different species of scale. We need to know the species of the tree in order to identify the scale. Please tell us to send clear photos of the leaves (single leaves and multiples) so that we can pinpoint the species.