API to show who granted or changed a user's access

My scenario is that we have a team that can assign a user access to a workspace (or other Power BI artifact), or change a user's access permissions.  We need to be able to monitor who is assigning or maintaining access permissions, the subject user and the workspace or artifact .  While I can see activities in the ActivityEvents API response, such as 'UpdateFolderAccess' and 'UpdateWorkspaceAccess', it provides me with the user Id for the person making the change and the workspace name but not the user that has been assigned the access (or permissions changed). I've also looked in the Admin Portal > Audit Logs which takes me to the Microsoft 365 Admin Center - that does not render me the information I need either.  While I can build a report from the API data I'm extracting to highlight changes in workspace and artifact access, that doesn't provide me with the user that made the access change either, so either way I'm missing the link between the person making the change and the user to which the change has been made for.

Is there any way to be able to identify the subject user to which the change was made?  

My search of the forum shows my question was asked a couple of years ago with no solution identified, so I'm hoping something may have changed in the last 2 years that can now provide this missing piece of information.