symmetrize bones, pole wrong direction - CG Cookie
Beginner] Why does my armature do this when I symmetrize? : r/blender
Mirroring bone roll error when rigging (I've searched high and low) - Basics & Interface - Blender Artists Community
Extrude — Blender Manual
rigging - Symmetrize bones not working as expected - Blender Stack Exchange
Uefy 2.0 (Pro Edition) make Blender's rigify rigs compatible with UE5, also has a FREE version - Character & Animation - Epic Developer Community Forums
IK and symmetrize option created this strange spike on the knee - Ask - GameDev.tv