Are you looking for a 1:1 alternative to pocket ?
I've heard good things about Readeck.
Linkace is similar but you'll have to wait a bit for their official instance
I found this while browsing after Pocket announced shutdown, but haven't used it. It's pitched as a Pocket alternative, has support for Pocket import and similar features, but I don't think there's a dedicated Linux app.
I personally use Linkora but it is a bookmark manager, doesn't have an in built reader. It has both appimage and deb packages and is available on other platforms as well.
Shiori is a Pocket clone but I haven't used it
Almost all Pocket alternatives need self hosting. I was using Joplin web clipper and now I just use Linkora.
There's also Linkwarden.
Chaski is mostly an RSS reader but it can find feeds for websites as said on it's page and dowload articles.
TLDR - If you just want to save/bookmark articles, give Linkora a try. Or you could use the web clipper of Joplin.