It wasn't in:
The Acorn Electron, BBC Micro, BBC Master, BBC Compact, Commodore 64, ZX-Spectrum, Amstrad CPC, Apple II, BBC Master Edition, BBC 6502 2nd Processor, BBC Master, IBM/PC, Atari ST, Amiga, MSX, NES or the Acorn Archimedes. Nor was it in Elite, Elite Plus, Frontier: Elite II or Frontier: First Encounters on all platforms.
It was mentioned in a short Novella the Dark Wheel written by Robert Holdstsack in 1984. That launched a hundred other great writers writing about it. Read it as you desire.
The Dark Wheel
So the quest for finding Raxxla would be disappointing if some noob player ever stumbled across it in Elite Dangerous. Me, I'm more into awaiting the major Hollywood motion picture of " Elite: The Movie". It doesn't seem that Frontier wants to go there. I'll need to win 500 million in the lottery to work on this...and the really great directors are getting old!
Well...Maybe 2021...
Regards