I used Fusion 360 generative design to generate these models.
I have included the F3D file and every generation as a .F3D and 3MF.
See how it was designed in my tutorial

Credits:

GTX420

Download 3D models

File	File size
generative-design-shelf-bracket-model_files	223 MB
generative-design-shelf-bracket-other_files	442 KB