Skywatcher
Captain
I don't see any crippling sanctions imposed on the US over the years despite all the arms sales it has made to Taiwan. China's bark is worse than its bite.
Taiwan would have no possible reason to do that. The US doesn't want diesel-electric submarine designs and Taiwan wouldn't try to destroy a new relationship with a country that sold it arms.
France giving the blueprints for the Agosta means that the US now has a ready made source for SSK design data (France can't be sure that the US wouldn't make SSK designs as a way to earn extra export cash and project influence, now that the USN might be cutting back on ship orders). At the end of the day, the RoC cares only about favor with America, not about France (guess why).
Yes, the PRC *might* not risk economic relations with Europe (and that's assuming there's only the option of letting Paris sell to RoC scott free or collapsing the Eurozone. Plenty of other ways to harass France). But in this current situation with France possibly losing its AAA rating, does Paris really want to risk everything for a few measly billion Euros?