I have a 10 inch BOOX device and was using Instapaper. But it's buggy and fails paginated rendering a bit too often. vs. Pocket doesn't have any pagination mode.
Pagination is very nice to have especially for e-ink based devices where scroll UX isn't smooth.
If you want to save the article for offline reading with pagination, use the Print to PDF option on the Chromium-based Kiwi Browser, and select A5 paper. This is narrower and shorter than US Letter, so it'll flow better on a 7-inch screen.
Finally, if you want to convert articles to EPUB, you can do so by pasting the link into: https://dotepub.com/converter/?lang=en . On desktop, I have a FF extension that handles this, but it doesn't work on Android.