The extension ( located at https://marketplace.visualstudio.com/items?itemName=SyncfusionInc.Essential-UI-Kit-Xamarin-Forms ) is not adding updated XAML codes ( located at https://github.com/syncfusion/essential-ui-kit-for-xamarin.forms ).
create new Xamarin Forms solution, open Essential UI Kit for Xamarin with right-click on Shared Project, click on "Select All" check boxes for all categories, click on "Add" compile to see errors, compare added code pages with code on github to find differences.
I have updated all development tools. Please find the file attached.
*** I believe , if I am right, nobody has used this extension after latest update. So this is an opportunity to solve it immediately.