BIG SUR 11.2 Extended Display

Big Sur 11.2 - Still have Extend Display Problems. Using apple thunderbolt to try and extend 2020 MacAir to 2011 iMac (as an additional display) 

no joy ...assistance appreciated !

I have noticed when I go to System Preferences>Displays ...I don't have a tab called "Arrangement"
(I only have Display , Colour, Night Shift ..... I am missing the Arrangement Tab
Same here I updated yesterday and neither of my external monitors work now, worked fine with release 11.1 Also can confirm that the Arrangement tab is no longer in the display option which I assume is causing the issue.
BIG SUR 11.2 Extended Display
 
 
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