redeem code
why is no time to die unavailable to download on itunes with a redeem code
Are you referring to a code that came with buying the disc version?
Please ask the vendor/distributor that supplied the code about when and where is it available. Likely the inlay with the code had small print with terms and conditions, or a link for that.
Redeem digital copies of DVDs or Blu-rays in the Apple TV app or iTunes for Windows - Apple Support
If you still can't redeem the code or download your Digital Copy, after all other checks, then contact Apple Support.