My assessment:
The EoS/EoL Announcement states that the final maintenance rebuild would be released by 31 January 2021. The 16.9.7 rebuild, released on 14 Feb 21, aligns with this milestone and indicates a 14-day slip in posting to cisco.com.
Likewise, the Announcement states that the final rebuild to address security vulnerabilities would be released by 4 Aug 21. The 16.9.8 rebuild which addresses five security vulnerabilities, was released on 1 Sep 21, representing a 27-day slip in posting.
Software releases chronically come in three flavors: (1) late; (2) on-time, but with originally targeted bug fixes and/or new features de-committed from the final image; (3) both late and with de-commits.
Disclaimers: I am long in CSCO. Bad answers are my own fault as they are not AI generated.