At the moment, I believe that there is no such option to trigger a notification to a specific e-mail whenever a business user is created. The notifications currently support other operations of the system, and there are documents in the help center on how to set them up.
As a reference, you can check the below link on how to work with notifications:
I suggest you to post this enhancement request on our Influence Portal, so it can be upvoted by other users and considered by our development team for future releases of the system.
The link to our influence portal is the following:
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