Are Optional Updates of 20H2 must to get Windows 10 21H1?

Hello Everyone, I updated my Windows 10 to 20H2 today only and other small updates after that but did not downloaded 'Optional Updates'. And also I did not receive the Windows 10 21H1 update. So, is it necessary to download optional updates in order to get Windows 10 21H1 update because today is 2nd June 2021 and I still haven't received the 21H1 update. Whenever I click on 'Check for Updates', It says 'You are up to date'. So are 'Optional Updates' preventing my system from getting Windows 21H1 update? Please Help.