You can use Bulk import tool to move Assets from Box.com provided it's underlying storage is AWS or Azure. https://experienceleague.adobe.com/docs/experience-manager-learn/cloud-service/migration/bulk-import.html?lang=en

Maybe you are adding incorrect value for the node and npm versions in pom. Can you share the pom.xml snippet for the node and npm versions?

You can check with Adobe support Team for new language code. For existing check https://developer.adobe.com/document-services/docs/apis/#tag/OCR/operation/pdfoperations.ocr here.

Refer https://experienceleague.adobe.com/docs/experience-manager-dispatcher/using/configuring/dispatcher-ssl.html?lang=en for dispatcher.

https://developer.adobe.com/document-services/apis/pdf-services/  explains how to update PDFs using API.

You can try a sample response for Reports here: https://developer.adobe.com/analytics-apis/docs/2.0/apis/ to see if you can get segment details.

While most projects can be deleted, sometimes a project is related to an application you have published and, therefore, cannot be deleted.If a project contains an API submitted for approval (status: In Review or Approved), then the project cannot be deleted.If an App Builder project has been submitt...

Can you directly open the system console and see the CQ link configuration?

https://experienceleague.adobe.com/docs/experience-manager-cloud-service/content/assets/manage/assets-insights.html?lang=en is helpful for Assets insights.

https://experienceleague.adobe.com/docs/experience-manager-65/deploying/deploying/data-store-config.html?lang=en is quite helpful for data stores.