I checked it out, but most of the public instances I looked at use google + bing. I think I only came across one that used Mojeek, but they deranked it so google results were still at the top.

Yeah you can customize them -- if you never clear your cookies.

Pretty much need to self-host it to customize it.

Dig out old PC from somewhere, install some Linux distribution, Tailscale and Docker/Podman, and install SearX that way.

4get.ca has been great for me.

The best thing is to self host it, to have better uptimes and custom default settings

I stopped using it not because of the results but because you couldn't swipe back without it sending you to the base website.

On DuckDuckGo (and google n others) a search is shown in the URL like looking for frog:
https://duckduckgo.com/?q=frog&t=fpas&ia=web

However in SearXNG it just shows
https://searxng.world/search
Which I don't have an issue with, however when you click on a link and then go back to the search results it would have no idea what you searched for as it's not in the URL and show an error.

That aside, the UI is great. icons don't swap around on you like Google or have annoying popups about 'privacy' like DDG. On the topic of search results, it was good enough for me. Not great but then again there aren't any good search engines right now.

I use ononoki for almost a half year without effort.

Using it on my own server since... Ages ☺️ Can only recommend it. Even though google's results are often... Weird up to completely unhelpful.