Lots has been discussed about Trump's 21 gun salute, 3 seconds apart, vs the video of Biden's 10 gun salute, 10 seconds apart. But I went to compare the last 4 presidents and guess what?
Bush: 21 gun salute IMMEDIATELY FOLLOWING HIS OATH
Obama: 21 gun salute IMMEDIATELY FOLLOWING HIS OATH
Trump: 21 gun salute IMMEDIATELY FOLLOWING HIS OATH
Biden: No salute after oath
^ Listen, no salute, no guns going off like with the others.
The video passing of the 10 gun salute is at Arlington well after the oath, which diverges not just in it's nature, but it's timing. Military broke tradition and did not salute Biden after his oath. Infer what is obvious from that.
It should be pointed out that Arlington is not part of the District of Columbia, aka Washington, DC. It is part of Virginia, USA. If Xiden is not POTUS, but a foreign diplomat/envoy from DC to the United States, it'd make sense he'd only get 17 guns and delayed, when he visited American soil.
GREAT ADDITION
It really does look as though the military only recognizes Biden as President of DC, if that