I share your sentiment. I maintain a similar project (https://theforest.link) and the vast, vast majority of the submissions I get are dev blogs, written in English.

Why is that the case, that I don't know. I have two theories though.

Theory one is that these are niche projects, and niche projects are discovered by people who browse the web in "unique" ways and those people tend to be, for the most part, developers.

The other theory is that in 2022 web, it's developer that for the most part still run personal indie blogs. The majority of people have moved over social media or more recently on things like substack.

EDIT: to add an extra bit of detail from my experience. While running projects like this one it's hard to decide what to do with sites that are written not in a language that you speak because you risk "promoting" all sorts of random stuff that maybe you don't want to help promoting. So it's safer to stick with content you understand and that ends up being English