radio.write verifies a successful transmission?

Projects Networking, Protocols, and Devices
6

With this code

  commsDelay = 10;    //while a connection is true
   delay(10);      //commsDelay "won't" increment.
   commsDelay += 10;   //only when no connection does it "truly" add.

commsDelay will never exceed 20. And note the need for +=

Try something like this

unsigned long latestMessageMillis;

void verifySuccessfulComms(){
   if(millis() - latestMessageMillis >= 1000){
      Serial.println("Not available");
   }
}

void loop(){
   if(radio.available()){
   radio.read(msg, &sizeof(msg));
   Serial.println(msg);
   latestMessageMillis = millis();
   }
   verifySuccessfulComms();
}

Get into the habit of running your code as often as possible - ideally after every small change.

...R