Google doesn’t use an API. It just scrapes pages
Reddit Migration
### About Community Tracking and helping #redditmigration to Kbin and the Fediverse. Say hello to the decentralized and open future. To see latest reeddit blackout info, see here: https://reddark.untone.uk/
Not API related as google uses crawlers to scrape and index everything.
Use the following search term in google:
site:reddit.com subscribe to kbin magazine
Then is the reason that no Reddit posts appear on the search because Reddit is restricting access to that page?
I think that the problem may be on your end somehow, unless I'm just misunderstanding what you're looking for.
Here are the first 10 results from google that the above search term brings up for me:
https://www.reddit.com/r/RedditAlternatives/comments/146ucmx/how_to_use_kbin/
https://www.reddit.com/r/RedditAlternatives/comments/145o617/i_am_very_confused_about_kbin/
https://www.reddit.com/r/retroid/comments/14e7ali/if_anyone_is_interested_i_made_a_retroid_magazine/
https://www.reddit.com/r/KbinMigration/comments/145bwof/the_redditors_guide_to_how_kbin_works_your/
https://www.reddit.com/r/kbin/comments/14gtzrc/why_in_my_kbins_subscriptions_appears_magazines/
https://www.reddit.com/r/astateoftrance/comments/14797hi/i_created_a_magazine_on_kbin_for_asot/
https://www.reddit.com/r/Mastodon/comments/14gn81e/you_can_follow_kbin_magazines_via_hashtags_posts/