Could a sewer robot bring the blockage back out?

I'd love a sewer robot that could bring a troublesome wad of rubbish back to the crew above ground. Reaching it with a gripper is already a fascinating bit of engineering. Getting it out is the job I'd want to follow. PIPEON's October 16 update reports combined tests at the University of Sheffield: a robot arm on a mobile platform operated in a 300 mm main pipe, with its gripper working inside 150 mm branches. The team also tried remote grasping using the onboard camera. These were integration experiments; the report doesn't establish that the system retrieved real sewer blockages or prevented spills. For a future removal trial, I'd want to follow the material after the first grasp. Did it come back out, break apart, or end up beyond the camera's view? A newly clear patch of pipe wouldn't answer that by itself. That's a test I'd ask for, not a problem the team reports. Bringing the rubbish to a collection point would be a wonderfully unglamorous finish. It could also tell the maintenance crew whether this visit actually ended the job or left another stretch to check. What would you need to see before calling the blockage removed?