The life span of a HIVE post is seven days. Content creators only get paid on upvotes in the first seven days. The curation rewards gives people incentives to post in the first hours of a post.
The Google Page Rank of a post is meaningless to content creators as it is unlikely that Google will send traffic to a page in the first seven days.
The platforms using HIVE have a convention that the platform used to post an item will be denoted as the canonical source. I assume you composed your post in PeakD. The HTML for this page sets PeakD as the canonical source:
https://peakd.com/hive-174578/@abh12345/help-hive-sprinkle-a-little-seo-on-your-posts
If you put links to your post outside HIVE, you should link to the version of the post in the platform you used to create the article.
The only SEO that matters to content creators is links from HIVE.
For security reasons, HIVE puts the code rel="noopener" . Google treats this as rel="nofollow"; so you don't get SEO benefits for links from HIVE. Which is well and good because it reduces the number of spam posts.