I switched to Wallabag. 14 day free trial (an actual free trial that doesn't require CC info). There's a Pocket import function. I found it useful to filter the .csv that Pocket downloaded me into two .csv's, one for unread articles and one for archived articles, that I respectively imported into Wallabag as the import feature allowed for "mark as read" on imports.

About 10% of the articles I had didn't download due to Captcha requirements or paywalls that had been added since I had archived the article in Pocket. Once my articles imported to Wallabag, I filtered the unread list from 0 to 3 minutes which showed me all the ones that were paywalled or only saved snippets. I fixed them with the Wallabag browser extension, which has an option to save content direct from browser.

I now have Wallabag on my Android phone, Boox ereader (runs Android), and Kobo ereader (via KOReader). No issues and I'm liking it better than Pocket.