Support for CentOS 8 Stream
After a lengthy investigation and discussions with Senior cPanel Support, CentOS 8 Stream and the upcoming release of CentOS 9 Stream are not currently supported by cPanel. See It is possible to install cPanel on CentOS Stream which is unsupported
Currently there are only a handful of operating systems that are supported by cPanel, CloudLinux (versions 6, 7 & 8), CentOS (7 & 8 [ EXCLUDING 8 Stream ] SUPPORT FOR 8 ENDS 12/31/2021), and AlmaLinux 8. CentOS 8 Stream is very similar to these systems since it follows the same development track. Support for CentOS 8 Stream shouldn't be too difficult to include.
Confusion has arisen with cPanel documentation because it does not specifically exclude CentOS 8 Stream as a supported operating system, but there is a buried support topic, as mentioned above, that covers lack of support. The installation of cPanel on CentOS 8 Stream will happen flawlessly, and from my testing, cPanel will have not problem functioning properly. The issues arise when it comes time to update cPanel as CentOS 8 Stream does not properly return what RPM's are failing to install. This makes it difficult to know what packages are required for the cPanel update to finish, causing a failed update.
A request has been filed with cPanel Documentation Team to amend the cPanel CentOS requirements to specifically make mention of the lack of support for CentOS 8 Stream: DOC-16679