I have created a tech content platform with thousands of tech feeds from individual bloggers, open source projects and enterprises.
The content is organised into spaces. In the Selfhosted space, you can find the latest articles about selfhosted apps. In each space you can control the filtering with a threshold parameter.
There is also an RSS feed that you can subscribe to: https://insidestack.it/spaces/selfhosted/rss
FYI I also plan to open source the full source code (frontend, backend, Hetzner build pipeline) to create more trust and grow a community.
Also people could then create new apps for all kind of topics (not necessarily tech related…)