If the combat parts from the original countries (USA/UK/Germany...) are smuggled in without a valid export permit, they are considered smuggling items and will not have ongoing support and warranty to keep the critical parts up and running. This key information was mentioned by the talkative and brainless Uncle Kor in a public interview session (Uncle mentioned a lot of blacklist items without permits from the orginal countries). It means that ongoing Taiwan-made submarines will encounter a lot of issues in terms of combat readiness. Anytime the IDS could stop working, which could endanger the navy staffs on board.
It is part of Taiwan Tax payers money may suffer a huge loss soon: In 2019, Timoney Technology filed a lawsuit against the Taiwanese government and the Taiwan National Chung-Shan Institute of Science and Technology (NCSIST), alleging that they had infringed on its patents by developing and producing the CM-32 and CM-33 combat vehicles. The CM-32 and CM-33 combat vehicles are eight-wheeled armored vehicles that are used by the Taiwanese military. The vehicles are designed for a variety of missions, including reconnaissance, infantry transport, and fire support. Timoney Technology alleges that the CM-32 and CM-33 combat vehicles incorporate a number of patented technologies, including the design of the armored hull and suspension system. The company is seeking damages and an injunction to prevent Taiwan from further infringing on its patents.