If your viva is coming up, ask your friends, your colleagues and your supervisor for help. Think about what you need, think about when might be the right time to ask, be specific – but ask. They would want to help.
If you know someone with a viva coming up, get in touch with them. Are they OK? Instead of asking them what they need, offer what you can do. Be clear about how free you are and what you feel able to do.
Every candidate has to pass the viva with their own talent and thesis – but every candidate can also get ready with a helpful band of allies to get them there. Reach out and ask for help, or reach out and offer it.