According to
https://docs.blender.org/manual/en/latest/files/asset_libraries/introduction.html#bundled-assets

> Blender includes many assets out of the box, these are contained in the “Essentials” library.
> Included in this library are:
> - Hair node groups
> - Smooth By Angle Node Group

These are available from https://projects.blender.org/blender/blender-assets,
but unfortunately there is no (useful) tarball, only the repository with GIT
LFS references.

The binary builds from blender.org include these files.

Bug ID	1231122
Summary	Blender: "Essentials" library assets missing
Classification	openSUSE
Product	openSUSE Tumbleweed
Version	Current
Hardware	Other
OS	Other
Status	NEW
Severity	Normal
Priority	P5 - None
Component	Other
Assignee	screening-team-bugs@suse.de
Reporter	stefan.bruens@rwth-aachen.de
QA Contact	qa-bugs@suse.de
Target Milestone	---
Found By	---
Blocker	---