Israel annexed the Golan and East Jerusalem decades ago. These products are being boycotted. No, other nations are not obligated to recognize the annexation any more than they're obligated to recognize the existence of Israel. You'll note here,
Leaving West Bank, SodaStream chief accuses boycotters of anti-Semitism that despite closing their plant in the West Bank and putting nearly a thousand Palestinians out of jobs, they're still being boycotted because they have a plant in the Negev. Which employs Bedoins. And some Palestinians who can get entry permits to Israel. It's about delegitimizing Israel, not the West Bank or Ppalestinians. For whom unemployment or lower local wages are an objective of BDS.