How to Create a Custom Paint Brush from an Image in Affinity Designer

You can create a custom paintbrush from any image stored on your PC using Affinity Designer. PNG images with a transparent background will naturally look better than those with a background. You can also customise your paintbrush, such as the size, spacing and even colour. When creating a new custom paintbrush is always best to create a new category which will allow you to store your new paintbrushes in a certain location.

[BettyMullins]

so basically you do not have designer brushes but photo brushes?