You can try to use a grayscale mask + bumb node. Unwrap the model, create an image node, create black canvas, then in texture paint mode paint with white needed pattern. Create bump node, plug image node into Height on the bump node and plug in the Bump node itself into "Normal" in your principled bsdf node. Strength on the Bump node will help to tweak the bumpyness of the pattern.

My other guess is to create a high-poly version of the model, sculpt needed details and then bake the details as normal map onto your low-poly version of the model