Probably not possible. Their Wi-Fi access point is inside the capsule, the capsule is made from metal and probably shielding the signal somewhat. Maybe even quite a lot if it's intended to provide some radiation shielding. Also it's low power as it only needs to work inside the capsule, at the given distances signal attenuation will make it almost impossible to pick up anything.

What’s the NROs take on capturing the signal from the ground? They already have it from a satellite in space.

The correct answer is far too often the most boring answer.

But yeah, this is basically it. We could detect the signal, but they simply aren't emitting a signal in the right direction for us to detect.