We already had a Nikon FM3A camera listed on Lego Ideas back in 2019, but unfortunately, the project did not get enough votes:
There is now a new Nikon FM3A film camera on Lego Ideas – please register and support this project by clicking the “Support” button. I am not affiliated with any of the Nikon Lego projects, I just want to be able to purchase a Nikon Lego camera one day.
A few years ago, there was a Nanoblock Nikon F camera:
Amazon also sells several cheap “fake” Nikon Lego cameras:
Here are the details on the Lego.Ideas Nikon FM3A film camera: