Several dedicated platforms and artist communities offer hair stamps and brushes at no cost:
You can create your own stamps by drawing a silhouette on a 3000x3000px canvas, copying it, and pasting it into the Shape source of a new brush. procreate hair stamps free download
This site offers a variety of free hair brushes designed to mimic natural movement and textures. How to Install Your New Stamps Don't just stamp once
Once you’ve downloaded a .brushset or .brush file, getting it into Procreate is simple: including hair textures and stamps.
Their free design resources often include stamp sets for various hairstyles like ponytails and braids. How to Install Your New Stamps
Don't just stamp once. Layer different stamps with varying opacities and colors to create depth and realistic "shine".
A popular third-party site with a curated catalog of free brushes , including hair textures and stamps.