Yeah, it's not implemented. There's P2K[0] and crofflr[1] that act as middleware between Pocket and Kindle.
[0] $3 per month subscription https://p2k.co/
[1] $5 one time payment https://www.crofflr.com/#/home
[0] $3 per month subscription https://p2k.co/
[1] $5 one time payment https://www.crofflr.com/#/home
Pros:
+ QR-codes at the end of articles to go back to them
+ Clean configuration
+ Scheduled delivery
+ Reliable
Cons:
- Often misses images and, sometimes, even text from the original page. To be fair, I have found to be the problem of every web->ebook converter out there.
- It says it supports Kindle Back Issues, but they don't seem to work for Crofflr ebooks even on a top-of-the-line (Oasis) Kindle.
Matter of taste:
~ I'd prefer for every article to be in a separate book so I can read out-of-order, and delete and bookmark them separately. But the navigation interface within the single book (issue) is very nice.