I believe it is possible to use XSL data in a form fillable PDF but I have no idea how to do that. It may even be completely outwith the scope of Hero Lab. I have created my own custom output/character sheet that is available from the Community Pack. It's not quite the official character sheet but it does include everything in a single sheet.
DnD5e.info: A fan-created 5th Edition SRD and associated blog/gaming resource.
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