Burning Chrome. William Gibson. 1982. Day one, ground zero of cyberpunk. The narrator feels ashamed when his partner's girlfriend sees him jacked directly from his cybernetic arm socket into a repair deck. A reminder that he'll never have his arm back, despite what other advantages cybernetics give him.
Bruce Sterling, Neal Stephenson, Warren Spector, Shirow Masamune. Doesn't matter the decade or the medium or the language. The otherness and loss of humanity through the use of technology is one of the key aspects of cyberpunk. It might be the only hard rule of the genre.
Everyone running around with bad Zoe Quinn dye jobs and high-fiving each other because of how awesome the new cyber-nu-ginas are isn't cyberpunk.