Indeed the Default Document Understanding Template from UiPath is not Workflow Analyzer compliant.
Personally I think its an awful template, over engineered, clunky and confusing. All unneccessarily so.
I’d advocated for a fresh template (or set of templates) in line with a process orchestration approach but I didnt get so far, perhaps its something that can be looked at now again with the focus on products like Maestro as the default DU template doesn’t fit well into that mindset at all in my opinion.
TLDR, don’t use that template, you’ll find it easier to just build a custom linear workflow from scratch.