Welcome to the forum @glitchsys
I doubt anyone here knows Amazon’s complete strategy. You can read through the thread and help guess.
One thing that’s clear is that the cutoff they warned at top here has not happened, at least for my Duplicati.
Previous cutoff of OneDrive was also late, so apparently vendors will sometimes also offer grace periods:
OneDrive failing : “The remote server returned an error: (410) Gone.” shows reports from January 7 2019.
Migrating from Live SDK to Microsoft Graph said the cutoff would arrive November 1, but it did not happen.
Does the CloudDrive API still work ? had an August 7 answer with no hint about a universal API shutdown.
Given Amazon Drive’s rocky history with third parties, I’d still suggest NOT relying on continuing Duplicati support, and if it turns out that Duplicati gets cut off and something else still works, that’ll ease migrations.