Microsoft has released optional updates for Windows 10 versions 1909, 2004, 20H2, and 21H1 as part of its "C" release quality updates. These contain gaming-related reliability fixes and more.
Latest Windows Server LTSC Preview out in 18 languages with ISOs
windows server insider preview
Optional update for Windows 11 fixes Taskbar search, thread deadlock, & more
windows 11 insider preview