Imperfect Metrics
Viva success is not based on how many days you showed up to do your work.
Success isn’t determined by the number of chapters you have written, the number of papers you cited, how many conference talks you’ve delivered or whether you have several publications out there.
All these numbers can give a boost to your confidence though. The numbers mean you did something, repeatedly, and over a long period of time.
You need to look a little deeper for proof of your knowledge and capability as a PhD candidate, but a good starting point might be the imperfect metrics of a few numbers that show you did the work.
They count for something.