So just to clear a few things up as someone who has being certifying death and filling out death certificates and crem forms for 25 years…
old age is perfectly accessible on its own, especially for someone in her 90s. There’s no obligation to list other conditions unless they directly contributed to the death. It may well be that they wanted to keep some of her conditions away from the public eye as a death certificate is a public document.
it only needs one doctor to legally confirm the time of death. The legal time of death is the time the doctor confirmed the death by examining the patient. This can be many hours after (and sometimes the following day). If it is an expected death we wouldn’t necessarily interrupt family at the bedside to confirm death.
one doctor still does the death certificate but the regulations were relaxed around covid around crem forms to cope with extra volume of deaths. Our hospital uses one doctor who saw the patient and ideally filled out the death certificate and then the second part of the form is filled by a medical examiner (also a doctor) who will go through the notes in detail and check everything is above board.
Hope that helps!