Actually, regarding the US military's amphibious assault capabilities, something counterintuitive is that the US has a standing amphibious assault force deployed in Northeast Asia, and coincidentally, the planned landing site is also Taiwan.
(This is not a coincidence).
In short, the US has a plan to launch a powerful landing on eastern Taiwan, supported by two carrier strike groups. Under this plan, the US would clear out the PLA's naval and air forces in eastern Taiwan, then, under the cover of carriers and bombers, severely damage the PLA's forces there. Afterwards, several US amphibious assault units (MEUs) and airborne IBCTs would conduct amphibious landings and airborne assaults in places like Taitung, Yilan, and Lanlien to clear out the remaining PLA forces, rebuild airports and ports, establish contact with the Taiwanese military, and create a supply line between Taitung and Okinawa, laying the foundation for a counter-offensive in western Taiwan.
I haven't discussed the feasibility of this plan with you; I'm just telling you it exists.
Therefore, in the long term, the US's best-prepared amphibious ready groups and airborne IBCTs are deployed in the Pacific. Trump's move of the Tripoli ARG in the Pacific is essentially transferring troops originally planned for a Kamikaze beach assault in the Taitung region to the Middle East. Their combat readiness and personnel quality are among the best of the four classes, making them capable of executing Trump's Persian Gulf beach assault plan.