This is a short video guide on combining multiple FBX animations into a single file for use in Unity. Also covered is adding root motion to your animations for seamless transitions.
How to Combine Mixamo Animations in Blender 2.9 for use in Unity

Do try this at home
This is a short video guide on combining multiple FBX animations into a single file for use in Unity. Also covered is adding root motion to your animations for seamless transitions.