This is a paid asset, but now you can download Blood Decals and FX (BuiltIn+URP+HDRP) for FREE, but please remember this package is provided only for learning purposes or to be able to test before buying the product, NOT FOR COMMERCIAL PURPOSES.
Detail this asset from Unity Store: Original Link
Blood Decals and FX (BuiltIn+URP+HDRP) v1.04
Check documentation for render pipeline packages and version links. Default setup is Standard or Built-In render pipeline so for URP and HDRP please check the documentation link after downloading.
A large set of blood decals and effects such as spurts, splats, pools, drips and decals. Scripted for drying effect and full control of look and feel.
Add your own textures, masks and normal maps for even more usability!
Decals are separated into small meshes which you place just in front of a flat surface.