Providing the context of where you found it could help pinpoint the exact version.
: Fan-made "remastered" versions of older mods often use this naming convention. For example, some users have created upscaled texture packs or consolidated mod collections for games like Final Fantasy VII using tools like ESRGAN or Gigapixel AI. Onyx 2.0.1, or remastered, or something.7z
While there is no single widely recognized software or mod titled "Onyx 2.0.1 Remastered" in major archives, the search suggests it likely refers to a distributed via unofficial forums or file-sharing sites. Providing the context of where you found it