Hi Ben, I tried it:
from arcgis.gis import GIS
source_gis = GIS("https://citypa.maps.arcgis.com","ikozoletov","************")
target_gis = GIS("https://citypa.maps.arcgis.com","gis_citypa","************")
item = source_gis.content.get("<19461bb6b6e341bda6f99d6592066146>")
target_gis.content.clone_items([item])
And get following response:
Item does not exist or is inaccessible.