Flightradar 24 has been interesting to keep an eye on lately, especially around Dubai and the Gulf of Oman. Several Stratotankers in the area at the moment, but in the past 48 hours have spotted an RAF C-17 going back and forth through southwestern Pakistan and over Kandahar to Kabul, several USAF C-17s, a smaller USN cargo plane, Spanish C-17, Turkish A-400 (that one taking off from northern Pakistan to Kabul), even a B-52 (that one over Dubai and the Gulf of Oman anyway). Not much in the way of transport flights visible on the northern borders of Afghanistan. Several C2A Greyhounds in the area as well, though the USN having carrier(s) in the area isn't really a surprise I suppose.
https://www.flightradar24.com/
Coverage over Afghanistan proper is poor but planes sometimes show up when near Kandahar or Kabul.
This whole situation is obviously very upsetting, so "watching" the airlift after a fashion has been kind of helpful as an alternative to doom-scrolling twitter.