Trouble with ESP8266 on Eero network
I was able to find an answer though I'm not sure why it works. It comes down to adding WiFi.mode(WIFI_STA); in the setup, as in
void setup() {
  
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  ...
  }

I was able to replicate success with another file on my ESP8266 device and Eero network as well.