Currently we are running Inventor 2022 and are testing the shaft generator in order to see if we can fit it into our workflow.
What stands out is that the shaft generator can only be accessed through the assembly in which it was implemented. If you want to use the same shaft in multiple assemblies, the shaft can only be accessed through the first assembly in which it was generated.
Having shaft generator access in the part environment seems more logical as it is a part that is generated, which can exist without being part of just one assembly.
In the calculation tab you are able to select a material:
This material library doesn't seem to be linked to the inventor/custom material libraries, which has the same material data in there.
Therefore you will need to manage two material libraries with the same data.
Having access to these libraries and to be able to switch between these libraries would be a great improvement.