Congressmembers have managed to inspect some. They don’t provide medical care:

“The most frequent feedback we got was the inadequacy of the medical care they are receiving,” said Schiff. He described meeting a diabetic detainee who he said has not received treatment for her condition in two months. “That’s frightening,” he said.

A fair number of people do seem to be deported to other countries rather than die in the camps.. Officially, the number who died in ICE custody is 32 during 2025, but it’s entirely possible that this number is an undercount. I will also note that ICE tends to deport people who are experiencing medical emergencies so that they die outside the US