It is not illegal unless she is stealing someone elses identity. There may be admissibility issues, but she should not worry about criminal prosecution

Can someone create a fake tinder profile?

Unfortunately, you cant make a new Tinder profile without a Facebook profile. So youll have to make a “burner Facebook profile” just like youve made your “burner email”. Note: Use your newly-created email and think of a new, fake name for your avatar.