Probably by now a number of countries have intelligence that can track individual military officers. No reason Biden wouldn’t, but so could UK and France, or all three.
There are a few others with capability but not likely to use it in current comditions.
“Probably by now a number of countries have intelligence that can track individual military officers.”
You could almost track this guy with a seismograph.
I remember during the Iraq war our military were calling Iraqi generals on their cell phones. That has got to put some fear into you.