You can put camera in transparent Faraday cage. With camera and gyro one can do basic positioning...
And all that stuff is a new supply chain and more weight which isn't payload.
That a countermeasure can be built doesn't mean it's necessarily effective to do so - your drones get less cheap, less numerous, you have to incorporate such systems into tactical and strategic planning.
cluster heads solve this beautifully because 1kg of high explosive kills everything good enough in 5 meters radius.
For comparison, the Excalibur GPS guided artillery shell was considered precision because it would hit within 5m reliably.
Compare to the lethal range of a 155mm, where the kill radius is 50m and casualty at 100m.
"That a countermeasure can be built doesn't mean it's necessarily effective to do so" applies especially to reading a corporate press release about a system doesn't even have a timeline for being on the battlefield.