I think the title says it all.
I saw a mention of an Omnivore integration I might check out, but it depends on Pocket still at least existing in the OS, and I would prefer to stay up to date. That and I am already proxying the Store through Calibre-web.
Wallabag or Omnivore are two alternatives, though I’m not sure how well it can be integrated into the e-readers.
Thankfully for current users of Pocket, according to this article, Kobo is planning to continue supporting the service even after the migration to Firefox accounts:
Sarah Vasquez, the Senior Manager, Communication at Mozilla, told Good e-Reader in an exclusive statement, “Kobo is aiming to update the Pocket login on their e-readers to support Firefox accounts. The exact timing is to be determined. However, Pocket’s existing Kobo users will not be affected nor lose access to their accounts. Note that new Pocket accounts created after August 15th may not have access to the existing Pocket login option, depending on when Kobo support becomes available. Kobo users can continue using Pocket on their iOS or Android device or use Pocket’s website.”