Just my two cents, but I think it's okay to suggest both. Everyone is capable of doing their own research and deciding for themselves what they like and don't like. I've never heard of SearXNG, but it looks really cool. May spin one up for myself.
I don't recommend Kagi because it lacks privacy and you have to pay for it.
It lacks privacy because you're required to log in AND pay for it. Logins enhance the chance your queries are logged; and providing payment information is a good way for law enforcement to obtain your identity; even when you've done nothing illegal. If you don't believe me just look up how Geofence Warrants work in America and how they've backfired in some cases.
If a company as big as Google complies with Geofence warrants; Kagi has no chance at all in resisting them, even when they're issued in an illegal and unconstitutional manner.