I wrote a simple "RSS to Email" application, there are a bunch out there, but I think that is simple and portable.

https://github.com/skx/rss2email/

You can self-host easily, and you get all your feed items by email where you can filter, archive, and search them easily. Having the items end up in your email is easier than having to share state in a database and cope with different laptop vs. phone vs. desktop views, etc.