How do i get SharePoint Site Last Activity Date via Graph without reports

Hello im trying to get the Last Activity Date of Sharepoint sites.

I can't use the reports endpoint as i can't change the org privacy sttings for reports so they are kinda useless for me.

But i can see that the Last Activity Date on the reports are looking good.
I can't find a way to get the values via other graph endpoint.

LastModifiedDateTime on the Site object seems to be something else.