I see what I'd consider miracles being performed in this forum, so giving it a shot for my problem:
Windows Server 2022 21H2 build 20348.2322, February cumulative was the only one to successfully install - I've gotten the 0x80073701 error for the March and April cumulative updates, though other updates have installed successfully since the issue started. If I'm reading the CBS logs correctly, the missing assembly it's complaining about every time is Microsoft-Windows-Server-Features-Package02~31bf3856ad364e35~amd64~en-US~10.0.20348.380.e5ee6317fcaf620acc6fac1efcff2b2e
Proactively also including my COMPONENTS hive since that seems to be a very common next ask in these sorts of issues.
