Bought this XPS 13 9310 touch version 2 weeks ago and has these two pen model PN579x for the laptop. Found out the pen buttons are working fine but not the touch.
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for Dell XPS 13 (9370) – SopiGuard
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Dell XPS 13 9370 (2018) review: An outstanding Ultrabook gets even better | Windows Central
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Amazon.com: Works PRO Stylus for Dell XPS 13-9370-D1705G High Accuracy Sensitive in Compact Form for Touch Screens [3 Pack-Silver] : Cell Phones & Accessories
Dell XPS 13 9380 - reviews, what's changed from the XPS 13 9370
Dell XPS 13 - 9370 Windows 10 Home 64bit English | eBay
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Amazon.com: Works PRO Stylus for Dell XPS 13-9370-D1705G High Accuracy Sensitive in Compact Form for Touch Screens [3 Pack-Silver] : Cell Phones & Accessories