There's a kajillion ways to extract info via analog hole from a well-known room. Unless this room has counter-measures (that are unlikely to be accepted by an authoritarian government) this ain't surprising really.
SCIF construction procedure is made explicitly to counter analog (and digital) intelligence collection.
I highly suspect that if the government of a host country didn’t let a guest country follow standard construction procedures like the use of high density construction materials, then the guest country would either not continue construction of the diplomatic outpost or at the very least they would not proceed with using their (now) vulnerable storage closet as a scif.
I wonder if a trusted laptop with VR goggles and a VPN would be sufficient to transmit and read most information. For added security, use an external modified keyboard that is not vulnerable to being tapped.
