It sounds like you're unfamiliar with the Numbering & Sections Options dialog.
In the Pages panel, select a page where you want to change the numbering (highlight the page) and choose Numbering & Section Options from the Pages panel menu. You can give a section virtually any pagination you want. After your subsection, choose the next page and you can do the same.
But this doesn't satisfy the request for automatically adjusting the numbering in the restarted section after the sub-section jump if the number of pages before the subsection changes. There is not a way, as far as I know, to continue numbering automatically from a remote section, even in a Book, so I think you are stuck doing things manually.
that answer is bitter sweet. Thank you for answering.
It is disappointing not to have this automated, but it is nice to know that I can stop thinking about a solution and move on.