KNN even before covid19 my uncle discovered in sg (public hospital - subsidized peasant) triage was already happening and interestingly it is not due to insufficient resources but due to laziness of staff members KNN eg when loctor or admission cust svc tells you not enough beds or have to either wait very long or discharge is an option etc the actual thing that was happening in the background can be shocking KNN I.e the ward nurses or bed mgt coordinator or maybe the approval etc was either too busy or lazy to process the logistics but actually there were many empty beds when my uncle did the verification walkabout spot checks KNN
There is a turnaround period. Depending on time you are at the hospital.
In Singpapore discharges usually happen at noon. The patient physically leaves around mid afternoon. Bed is cleared and ready for a patient early evening.
The BMU people work very hard and it is a thankless job. Often departments are asked to clear beds because the hospital is full. So we will try to discharge more patients.
Hospital admin prefers a hospital working close to capacity as it is good for reporting. Lean and mean.
Maybe your uncle was at the hospital in evening near visitor hours?
Also some departments and wards have more empty beds than others. Sometimes we get overflow patients. Eg surgical patient admitted to renal medicine ward.
BMU is tough. Really thankless. Can never make everyone happy.