I don’t know anything about that particular case. We tried HCQ where I work and it didn’t work so they stopped using it. Ivermectin wasn’t really approved but it wasn’t really necessary by the time it became the new miracle cure. Our mortality rate had already improved.. What worked was rotoprone beds, steroids, and mitigation factors, especially locking down the nursing homes.
A nurse with covid infected the staff and patients at a nursing home in my home town, six patients died. She volunteered for OT at the nursing home, which was where she normally worked, even though she knew she was positive.
Nursing homes were the worst place to be, along with covid wards. I read accounts of people presumed to have covid being put in covid floors and wards. Terrible things were done to our older folks by people who didn’t care and thought they were gods. Some people got their loved ones who hadn’t tested positive for covid out of those places but they had to take draconian action to do it.