@charlie-cook a connector was planned.
After Indictrans developed the connector it seems there was no requirement for another request. Hence I see no new feature request created in Github.
For a start, perhaps you can create a new feature request on Github and post it here so community members can go and upvote.
This would bring it to the attention of the devs and perhaps the foundation too can have a look at it if it has a lot of upvotes.
Apart from Quickbooks, I see people requesting instant integration/migration for Xero and Tally too.
One more thing to learn would be to identify the gaps that exist between these accounting softwares and ERPNext. In the long run it would be best for everyone to strengthen our accounting module. Afterall, the purpose of an ERP is to have all things at one place.