Just an update on the QB 2021 Desktop "Print to PDF" issue:

With the migration from Windows 10 to Windows 11, Microsoft no longer automatically installs "Microsoft XPS Document Writer" in the Windows 11 platform.  Hence, our QB 2021 Desktop and prior could not print and send invoices with PDFs attached through Outlook.  The error message from QB was "QuickBooks Missing PDF Component."  Tool Hub was unable to fix this problem but this article referenced below will walk you through the steps of reinstalling MS XPS Document Writer from within Windows 11 - its an "Optional Feature" found in App within Windows Settings (at the bottom of the page...where else).  Appears to be working.

https://www.limdynamics.com/blog/quickbooks-desktop-cannot-send-invoices-by-e-mail-in-windows-11

Hope it helps!