My earbuds exploding while I’m using them
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:
I personally use a private instance mostly because I like the simple search results page.
https://gitlab.com/Nulide/findmydeviceserver, a FOSS and self-hosted alternative to location history. Particularly useful for finding my device which has no Google services on it.