Since Ivy version 8 the DocFactory is included in the product, you can find the documentation here: https://developer.axonivy.com/documentation/doc-factory-doc/8.0.0/
You are allowed to add additional Aspose modules to your Ivy project. Note that the included Aspose licence is only valid in correlation to Ivy, you are not allowed to extract it.
To add an additional module you can download it from the Aspose website and add it to your Ivy project, you then have to load the new module in your code to use it.
For example if you want to load the Aspose Slides module:
com.aspose.slides.License lic = new com.aspose.slides.License();
lic.setLicense(ch.ivyteam.ivy.ThirdPartyLicenses.getDocumentFactoryLicense());