if you can buy a usbc amp meter like the 1 in the link, it will show what voltage and current its taking if any.
https://www.amazon.co.uk/YOJOCK-Voltmeter-Capacity-Temperature-Detector/dp/B09Z2XF4Z6/ref=asc_df_B09Z2XF4Z6/?tag=googshopuk-21&linkCode=df0&hvadid=606635923907&hvpos=&hvnetw=g&hvrand=14892014494310133300&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1007276&hvtargid=pla-1704825076524&psc=1&mcid=7465de9958c532df981ca9e0e9b7bfd7