Before your viva, reflect on the best of your work, your results and your thesis.
How can you communicate the value of what you’ve done?
What are the words that will share how good your thesis is?
Write summaries, capture keywords and rehearse talking about your work. Don’t leave it to the viva and don’t be too humble.Don’t bluster or over-exaggerate the outcomes of your work, but also don’t focus on the might-have-beens and if-onlys of the pandemic.
If you need to talk about the impact of problems and obstacles then do so, but leave no room for doubt that your work is valuable and that you are capable.