These log entries shows that the domain www.amazon.com was correctly resolved and the IP was returned to the client. The domain was not blocked by Pi-Hole.
Take a good look at the domains being loaded when you load the Amazon site. There may be other domains you are blocking that contain javascript or other elements needed to load the web page. Note, however, that I have never had a problem loading the Amazon website while running all the WaLLy3K ticked lists (about 750K domains).