Still waiting for a search engine that only searches Wikipedia, Reddit, Stack Overflow, Flickr, and a handful of other sites.
Here's the form to do exactly that:
Create a Lens
Name of the lens
Describe what the lens does, up to 300 characters. (optional)
The style of how results will be rendered
Lock your search results to a specific region
Choose Region
Include only these sites in results (up to 10, comma-separated)
Exclude these sites in results (up to 10, comma-separated)
Include pages containing these keywords (up to 5, comma-separated)
Use keywords in autosuggestions automatically
Automatically use your supplied 'Included Keywords' in autosuggest when the lens is enabled.
Exclude pages containing these keywords (up to 5, comma-separated)
File type
Include results before this date
Include results after this date
Yesterday
Show results from Yesterday to Today (UTC)
When checked, before and after times will do nothing.
https://blog.mojeek.com/2022/08/mojeek-focus-search-the-web-...
As most of the search alternatives rely on G/Bing in one form or another, there's not many in the position to offer this kind of customisation using an independent index. Disclaimer, I am an employee at Mojeek.
Why not load it into OpenSearch or some such?