If you login, there are what I'd call hidden reports, as they can only be seen by finding Show: dropdown on the Holdings tab.
Your URL bar will show something like this when you are successful:
balance-by-date.web.vanguard.com/compared-to-year-end
When I do this, I see 7.20% as of 11/20/23, for everything I hold. However, this is incorrect as I calculated XIRR with Google Sheets, using all transactions for these accounts YTD. With that I get a personal performance of 5.82%.
You have to carefully map out these pages, try them, and see what is available. However, you do not see what most of us call personal performance.
You can also look for Prices and Returns in the Show: dropdown. On that report you can find the YTD performance for individual investments. But this is for the fund, not for your account.