they're under the Giant Size TAB on the vol 1 Amazing Spider-Man series. these Giant Size issues questions com up on here all the time, so a search would've turned up this info.
Annuals, Specials, hardcovers, trade paperbacks, Free Comic Book Day/FCBD for regular series are usually not listed separately, but sometimes are, so mostly they're under the regular series name, click that, then click the appropriate tabs to see those issues.

directly:
https://comicspriceguide.com/titles/amazing-spider-man-the/1_giant%20size/sct
https://comicspriceguide.com/titles/amazing-spider-man-the/2_giant%20size/wmvt

See this thread for my search tips (4th post down): https://comicspriceguide.com/forum/topic12110-evil-ernie-youth-gone-wild-directors-cut.aspx

https://comicspriceguide.com/faqs for a few How To answers about submitting missing images and reporting missing issues etc.

Watch CPG's 'How To' youtube videos: https://www.youtube.com/playlist?list=PL3eOHtGDGIs0GGohUDuypf3TlQM2aupdo
edited by collectibleshop on 1/19/2021
edited by collectibleshop on 1/19/2021
edited by collectibleshop on 1/19/2021

Would it be a correct assumption that the indicia would state "The Amazing Spider-Man" then?
Or does this say "Giant-Size Spider-Man"?
Just curious. Because if the indicia is different, wouldn't that technically make it a different series?