If this doesn't scare you already, I'll rephrase: Your queries may be sent to the built-in search engines even if you think you're only using Kagi! It does not actually replace the need for real custom search engine support in Safari. The official Kagi docs coyly acknowledge this [1]:
> For a better experience, we recommend selecting a single search engine to redirect (DuckDuckGo or Ecosia are recommended options as they have better privacy policies than other alternatives).
[0]: It's an amazingly portable device made ahead of its time - Apple really should revive this form factor and stick an M1 chip in it. [1]: https://help.kagi.com/kagi/getting-started/setting-default.h...