I don’t really know how they do it, but some do run newer Android versions like Android 14 (Meebook M8, Bigme B7). Anyway, the lack of Play store isn’t really a consideration in China, it’s only for foreign markets they have to include the Play store. This also means that China has many more Android e-ink brands than are available to us (which mostly are Boox, Meebook, Bigme or Hisense).