Viva prep is more.
More reading to help you remember and recall what you need.
More writing to help you bring everything together.
More thinking to help you figure out that you’re ready.
But, for all of these and everything else you do to prepare, only a little more – only a little more work, a little more effort, a little more time. You don’t need much. Not by the time you’ve submitted. Not with so much done already.
A little contrast to this post from November 2020.