Photos look legit.....Spokeshave who has worked with SEM (Scanning Electron Microscopes) in a prior occupation in an applications lab for the SEM.
Just another reason to reject the Coronavirus vaccine....reaching for my bottle of Ivermectin tabs.
From what I could find, Graphene oxide isn’t magnetic:
https://nanografi.com/blog/60-uses-of-graphene/
https://www.techinstro.com/graphene-oxide-properties-and-applications/