Fortunately, you can read through the source code of SearxNG and even modify it - provided that you also publish the modified version to your users if you host it publicly.
You can run your own instance, public or private. Or you can use a public instance.
Internally, it uses other search engines, rather than crawling the entire web and indexing everything.
Introducing vimux, the brand new distro nobody has any idea how to exit!