In "Classic" Unity maths, Quaternions have a method called FromToRotation (https://docs.unity3d.com/ScriptReference/Quaternion.FromToRotation.html). This doesn't appear to be implemented in Unity.Mathematics, and a customer who is porting parts of their code to DOTS has had to resort to using the old Quaternion implementation to achieve this.
In "Classic" Unity maths, Quaternions have a method called FromToRotation (https://docs.unity3d.com/ScriptReference/Quaternion.FromToRotation.html). This doesn't appear to be implemented in Unity.Mathematics, and a customer who is porting parts of their code to DOTS has had to resort to using the old Quaternion implementation to achieve this.