How to split a big folder into multiple standalone archives using rar or 7zip console?

Example: I want to add a 100GB folder to archives of 10GB each using rar or 7zip console on Windows. But each archive must be independent/standalone. Able to extract without the other archives I can split into multiple archives using the commands below.

winrar:

rar.exe a -v1G -m0 output.rar inputdir

7zip:

7za.exe a -v1g -m0=Copy output.7z inputdir

But when I do this each archive needs one another. They cannot be uncompressed as individual archives

There is a powershell approach but this is one very slow and high on resources. Also much more complex to change options/parameter/arguments. I really don't like it.

Some sources:

https://stackoverflow.com/questions/25553787/split-to-volumes-using-batchhttps://stackoverflow.com/questions/75423366/zip-a-folder-of-files-into-multiple-stand-alone-zip-files-of-maximum-size

How to get this done using rar or 7zip console?