Sidar Custom lenses have the option to include only results from up to 10 whitelisted sites. I propose this limit be increased. This would make the "lenses" feature far more versatile. An example of an implementation of this is Google's custom search feature, which allows high levels of customization.
Luis There are a few important considerations that led us to limit the number to 10 websites for now. Expanding beyond this would require non-trivial effort. For now, I’ll mark the thread as under review to assess the community's interest in doing this.
Kiito I’d be interested in creating a lens with various German-speaking subreddits so I could search through all of them. But for that, I’d need more like 20-30 entries. (Mainly, I wanted to do this to prevent the issue where, when I enter search terms in German, I instead get results from English subreddits that have been machine-translated into German. But that’s a different problem cough cough https://kagifeedback.org/d/5212-low-quality-translated-reddit-results)