Searching for "airpod" in settings brings up -
Accessibility, "Headphones/AirPods/Beats", Conversation Boost, Noise Cancellation, Press and hold duration, Press speed, Transparency mode
Not sure what went wrong for you, these results seem pretty much on point.
This literally happened yesterday. It tried to bring me to a safari search and I got no other hits. Could've been just a buggy moment with search who knows.
I tested it just now. My AirPods are connected to the iPhone, and searching “AirPods” gives me the accessibility settings for them, not the actual AirPods’ settings. I have to open the Settings app and then they’re up there, but it’s ridiculous that they don’t show in the search.