Ultimately I am trying to suss out what unique capabilities inside of QlikView that you're using which you aren't finding in Qlik Sense. That style of functionality would be called Loop and Reduce. It loops through a dimension and creates sub QVWs based on the values in the dimension. As you mentioned, this makes distributing a subset document easier rather than using Section Access to reduce the available values to the subset the user or set of users should be permitted to see.
In terms of how to accomplish this in Qlik Sense, if you're using the loop & reduce to provide security then separate apps would be needed. You can easily variablize the data load and declare the variable at the beginning of the script. Something like this:
SET vCustomer='A';
LOAD
Customer,
Value
FROM [lib://data/full.qvd] (qvd)
WHERE (Customer = '$(vCustomer)')
;
While I'd agree that this isn't as robust as the functionality inside of QlikView where you do not need to necessarily know how many discrete values are available in the dimension that you're reducing on, this works perfectly fine on a smaller scale.
