not particularly - as mentioned in other threads these and many other civil airliners are mostly involved in troop flights and we are at present working many over the UK usually under RCH (Reach) callsigns.
Some go Stateside direct to places in eastern europe/the gulf region and then beyond (!), the 738 likely States-Shannon-eastern Europe (with an upgrade unlikely).
N321TZ was also in Munich the previous day.
Here’s some European 737-800 flights for ATA. All are military charters.
There are at least 35 airline companies who have contracts with DOD for flights when military aircraft are not available known as the Civil Reserve Air fleet,they move personal and cargo on an as needed basis.