I've been using a self-hosted instance of SearXNG (a meta search engine) to exclude a lot of spammy sites from search results. I'm not sure if you can force it

I've been using a self-hosted instance of SearXNG (a meta search engine) to exclude a lot of spammy sites from search results. I'm not sure if you can force it to only search a list of domains, but might be worth looking into.