China is not rushing to spam amphibious assault assets right now because it doesn’t need them. China has literally been preparing for Taiwan for decades, and people honestly think they would only rush to procure the critical hardware they need just before they decide to actually pull the trigger on reunification?!
China has had the means to retake Taiwan by force for many years now, even with direct American military intervention. Everything since had been about reducing the cost of such an invasion for China and the PLA in terms of lives lost and damage sustained to wider infrastructure.
You will also have to be a fool to think any American direct military involvement will be able saving Taiwan rather than trying to trash China’s economic heartland of its eastern coast. If they can save Taiwan, that will be a bonus, but their primary aim going in will be to destroy critical infrastructure and key factories, both military and civilian. That is honestly the bigger threat. Because while China currently can quite feasibly obliterate the US surface fleet with its AShBMs, hypersonic missiles and vast array of conventional AShMs, USN SSGNs spamming cruise missiles at Chinese civilian targets will be harder to counter given the vast Chinese coastline makes it impossible to effectively defend all approaches.
Somewhat off-topic but on the point of reducing civilian casualties -
I've noticed that many buildings in China are built with air raid selters. Residential estates, commercial buildings, office buildings, apartment complexes... every structure that has an underground level will have double function as a reinforced shelter. This is a feature of every coastal city I have been to. I don't know about inland cities as I rarely visit them.
Someone I know just opened a new building in Zhuhai. Just a low-level building with an underground car park, but the plot was small, so they dug four levels deep to fit enough parking spaces. The lowest level was designated to be the shelter in the event of armed conflict. I asked if the shelter was mandatory, and if it was built differently from the other levels.
He told me that these shelters are actually required by law, and that there were specifications they had to follow. The ceiling must be XX meters of reinforced concrete, it must have independent water supply, independent air supply to the surface, special storage areas for food and rations, drainage channels for wastewater...
I have never seen this kind of large scale contingency planning in any other country, and I have visited many places around the world. As usual, the Chinese government is competent enough to prepare for the worst.