Thunder and Voyager both have keywords Filtering. don’t know about others

I also use a proprietary launcher (Niagara) with network permission off. I tried kvaesito, kiss and lawnchair before but none of them are in my experience as polished as Niagara and smart launcher.

Not popular opinion I know but if smart launcher is good for your needs keep using it. If you have privacy concerns just cut off it’s internet access