I have given up as well. After trying to get an update to my 1909 version which I have had a few years, I finally watched a Microsoft video that explained these latest Windows updates are rolling out in phases, and if I don't see one in my security & updates area under settings, it is not time for my laptop to get one. I guess they are rolling it out cautiously so I will be more patient and wait. Apparently, there are issues.
Let us check the Installation log to find why the update failed. Please share the logs as mentioned in this article. You should use a File sharing service like Onedrive or Media Fire to upload files and share the link in the next reply.
The Panther logs. Files named Setupact.log and Setuperr.log from the following path C:$Windows.~BT\Sources\Panther
The Rollback logs: These usually are created if Windows Update rolls back. Files named Setupact.log and Setuperr.log from the following path C:$Windows.~BT\Sources\Rollback
[Only if the error code is 0xC1900101-0x30018] The Device Install Log from C:/$Windows.~bt\Sources\Rollback\setupapi\setupapi.dev.log
As the log size might be large consider zipping before uploading.