I don't believe the US draws its own maps for the area, as it has no claim to any of the area. There are multiple territorial disputes in the area.
The US Department of State disputes specific claims by China.
The PRC cannot lawfully assert a maritime claim – including any Exclusive Economic Zone (EEZ) claims derived from Scarborough Reef and the Spratly Islands – vis-a-vis the Philippines in areas that the Tribunal found to be in the Philippines’ EEZ or on its continental shelf. Beijing’s harassment of Philippine fisheries and offshore energy development within those areas is unlawful, as are any unilateral PRC actions to exploit those resources. In line with the Tribunal’s legally binding decision, the PRC has no lawful territorial or maritime claim to Mischief Reef or Second Thomas Shoal, both of which fall fully under the Philippines’ sovereign rights and jurisdiction, nor does Beijing have any territorial or maritime claims generated from these features.
As Beijing has failed to put forth a lawful, coherent maritime claim
in the South China Sea, the United States rejects any PRC claim to
waters beyond a 12-nautical mile territorial sea derived from islands
it claims in the Spratly Islands (without prejudice to other states’
sovereignty claims over such islands). As such, the United States
rejects any PRC maritime claim in the waters surrounding Vanguard Bank
(off Vietnam), Luconia Shoals (off Malaysia), waters in Brunei’s EEZ,
and Natuna Besar (off Indonesia). Any PRC action to harass other
states’ fishing or hydrocarbon development in these waters – or to
carry out such activities unilaterally – is unlawful.
The PRC has no lawful territorial or maritime claim to (or derived
from) James Shoal, an entirely submerged feature only 50 nautical
miles from Malaysia and some 1,000 nautical miles from China’s coast.
James Shoal is often cited in PRC propaganda as the “southernmost
territory of China.” International law is clear: An underwater feature
like James Shoal cannot be claimed by any state and is incapable of
generating maritime zones. James Shoal (roughly 20 meters below the
surface) is not and never was PRC territory, nor can Beijing assert
any lawful maritime rights from it.
Source of map