Yes, searxng is indeed making requests to all configured search engines.

The intended use of searxng is to proxy searches for many users, making tracking individuals difficult for the search engines, since everyone's data is mixed together.

Using searxng does however also bring some benefits if used by one person only:

• no browser fingerprinting
• convenience: get results from across many search engines at once

I personally use a private instance mostly because I like the simple search results page.

The thing with SearXNG is that it will search in multiple search engines in parallel and then aggregate the results. If the same result appears in all of the queries, it’ll be weighted more than one that appears in only one of the results.

This way you get very neutral overall results compared to the biased ones Google usually delivers.

Also, you can easily define custom search engines, so you could make it search on your favourite website as well.

From Wikipedia:

SearXNG removes private data from requests sent to search services. Result pages do not include advertisements or referral links. SearXNG itself stores little to no information that can be used to identify users.

I suggest using Whoogle.