db<>fiddle doesn't display a SQL Server `NULL` `rowversion` correctly.
It shows `0x` instead of `NULL`:
You might be able to fix this with an updated driver.
For example, this was fixed in https://github.com/dotnet/SqlClient/pull/998 for `Microsoft.Data.SqlClient`.
This is still not fixed despite installing all available Windows updates.
The Windows SQL Server instances (2014,2016,2017,2019,2022) all run on a single Windows Server Core 2019 VM - I'm not sure how to install a new version of SqlClient, and if I do, I'm not sure it won't cause incompatibilities with one or more of the older versions (though I can take a snapshot of the VM and roll back to it if necessary).