Everyone keeps using the word “Fake” which is not technically the right word to use, you should really use “counterfeit” as that means to try and pass off a “fake” item as the genuine article (ie deception) so that is illegal
All counterfeits are fakes but not all fakes are counterfeits
Some people have spouted the definition of copyright/trademark laws but unfortunately the problem with law is it’s open to interpretation it’s not a black and white thing there is plenty of grey areas