(I edited the question and removed the link to the company) - complex electronic products are difficult for all publicly available databases I think but ecoinvent is often used, I have myself verified several EPDs for a German smart home company for similar products, where ecoinvent and openLCA was used. If it is for EPDs as construction products following EN14804 (or ISO 21930) I would recommend the EN14804 add-on we provide for openLCA. The HiQLCD database has some more and especially some more recent electronics products with a Chinese background, but not specifically focussing on EPDs.
Hope this helps!
Andreas