Some synthetic oils are made from Group III base stock and some from Group IV, while other synthetic oils may be a blend of the two. Mobil sued Castrol and Castrol prevailed in showing that their Group III base stock oil was changed enough that it qualified as full synthetic. Since then American Petroleum Institute (API) has removed all references to synthetic in their documentation regarding standards. "Full synthetic" is a marketing term and is not a measurable quality.
It’s just “real oil” that’s sufficiently modified to not resemble the base oil enough.
Lubricant base oil is sourced primarily from the Middle East, including synthetic oils, greases, gear oils, and other products like transmission fluids. Including that for electric vehicles. Additionally, synthetic oils can be manufactured from natural gas, which is also sourced from the Middle East for most of the world.