It will obviously depend on what kind of nursing - a district nurse will do different things to a ward nurse will do different things to a scrub nurse will do different things to a CNS.
Our specialist nurses do independent clinics for patients with either transplants, or chronic kidney disease. They will see between 8-10 patients per clinic, and do blood pressures, examine them, check their medications and blood results, provide education on both self care and future management options, and change medications within a protocol. They work at the level of a registrar, can prescribe, etc.
Our ward nurses do full personal care for patients (along with the HCAs). Dispense and administer medications, assess and treat pressure areas/wounds, they are trained to carry out both haemodialysis and peritoneal dialysis on the ward, they do blood pressures, blood sugars, oxygen saturations etc and interpret these, they take blood and put cannulas in, they insert urinary catheters, they manage drains. Plus teaching other nurses and HCAs, discharge planning, liaising with families, physios/OTs/social workers and nursing homes/care agencies, infection control, investigating complaints/Datixes, and probably a tonne of other stuff I can’t think of right now. We have a fairly high intensity ward (a combination of very sick multi-organ failure patients, and some very short surgical admissions - so up to ten new admissions a day, and another 10-15 very sick patients). We have four nurses and two HCAs on a good day, but often only two nurses and 1-2 HCAs in reality, one of whom might be specialing somebody who is confused and on a DOLS.
They do a fuck of a lot.