(Bloomberg) -- More than 30 Taiwanese companies including Pegatron Corp. and Macbook maker Quanta Computer Inc. have now halted production in the electronics hubs of eastern China to comply with local Covid-related restrictions, spelling more trouble for an already fragile global tech supply chain.Most Read from BloombergIn Defense of Elon Musk's Managerial ExcellenceU.S. Stops Mask Requirement on Planes After Judge’s RulingPutin Calls Time on Foreign Listings in Fresh Hit to TycoonsTwitter Has