Yes, Kagi has Safari + Chrome + FF extensions on Mac + iOS Safari extension that sets Kagi as default search.

With the xSearch[1] app you can.

[1]: https://apps.apple.com/us/app/xsearch-for-safari/id157990206...

I use FF on my apple devices, it's easy to set the default search engine there. I can customize my preferred search engine on the settings app, but Kaigi is not there.

The only options for me is: - Google - Yahoo - Bing - Duckduckgo (my current option) - Ecosia

Thanks