Does urine spread cryptosporidium?

No. Cryptosporidium is spread by the fecal-oral route. Most commonly by ingestion contaminated water. Will cause relatively mior GI upset in normal healthy people. Recovery is rapid and complete. It can be dangerous, even fatal in immunocompromised people such as people who are HIV positive. Not transmitted by by urine.
GI tract . Crypto lives in the intestine of infected humans or animals. An infected person or animal sheds cryptosporidium parasites in the stool. Millions of crypto parasites can be released in a bowel movement from an infected human or animal. Shedding begins when the symptoms begin and can last for weeks after the symptoms (e.g., diarrhea) stop.