i know for a fact, KATL Has 5G UWB and low and midband Carriers right on the airport, and UWB uses ultra short ranges. that alone tells me that small cell sites are right on the property. I was just at KATL few weeks ago and my Note 20 was showing a MAXIMUM reception airport wide from the moment I walked in the doors at Terminal South to the time I stepped on the aircraft and sat down till doors closed which after I entered the aircraft, I did lose a single bar. the 5GUWB was faster than the WiFi coverage!
Now, lowband and midband, these populate your traditional tower and segmented emitters with midband evolving into the small cell site cans.