They can't, not even remotely close any time in the next 20 years at least. Can you imagine what a landing beach would look like being pounded by drone spotted artillery? See war in Ukraine. Forget the approach, anti ship missiles, mines, sheer volume of logistics needed. Stepping on the landing beach is a suicide without absolutely astronomical advantage in air power and ability to suffer huge attrition, even then.. 155mm hidden under camo/thermal nets, DJI drone rigged with magazines of small bombs.. Kyiv, Kharkiv, Kherson Childs play, this would make Diep and Galipoli look like walk in the park.

I would go as far as to say that US Army + Marines + Navy could not land on Taiwan without suffering multiple brigades of attrition AFTER at least a year long blockade and air campaign. It is that hard.

PRC has to surpass US in GDP, then spend 10-20 years of US level military spending, then maybe.