Wallabag is like Pocket but self hosted and better.

Omnivore.app is probably the best replacement for Pocket that I’ve found at the moment, it’s open source and has excellent Logseq and Obsidian plugins that allow you to download the articles to your devices.

From there it depends on what kind of reader you’re using and software you have on it. Probably the most straightforward would be to use Calibre to convert the markdown file generated by either the Logseq or Obsidian plugins to an epub and add it to your library like a book. KOreader can read markdown files natively if you have it on your device, but you’d have to use a third party sync service to get it on there as there’s no plugin for omnivore. It does have a wallabag plugin and a cloud storage plugin (only Dropbox, FTP, and WebDAV are supported) but I haven’t tested those.

So, on my (Android) ereader, I use einkbro which is a browser that will save pages to epub, then can be used and organized with most reader software. You can also combine multiple web pages as chapters to the same book pretty trivially.

I don’t have a suggestion that perfectly fits your question as asked, but figured I’d suggest it anyways because it serves a relatively similar goal for me.

I use wallabag, which then integrates into KOreader and others. A self hosted pocket.

I could download all my wallabag articles as EPUB and load them to an eink reader but most of my article reading is via their android app.

You can scrape the webpages as markdown or text file.