There is an Interim Fix for the Notes 11.0.1 FP2 client, which solves known problems with Apple Big Sure, etc.
Here is the list:
|NNAIBWX3MD||Fixed an issue where infobox would not show any Created date if document was created on or after Jan 1st, 2021 unless the document contained a $Created item.|
|AYAVBUVD2Y||[Mac] – Big Sur – Fixed an issue on Big Sur where Notes quits suddenly while switching between the PIM views||MAC Specific|
|AYAVBTJDNX||[Mac] – Big Sur – Fixed an issue on Big Sur where there was an intermittent crash in PaintWindowTab function||MAC Specific|
|SBOEBUJBMW||[Mac] – Big Sur – Fixed an issue on the Mac Big Sur where some mail and calendar views and navigation pane were displaying as blank when opened. Workaround was to double click or click within the view.||MAC Specific|