The Type Cover for the Surface Go also fits the Surface Go 2 (as far as I know, there is no new version), and the pens are compatible across the entire Surface range. Furthermore, the chargers of the Surface Go, Surface Book, Surface Book 2, Surface Book 3 and the entire Surface Pro (from 3) and Surface Laptop series also fit. Only the "old" (from 2012) Surface RT/Surface Pro/Surface Pro 2 devices use a different plug on the chargers.
Pro tip: For the Surface Go 2 with LTE, order the data sim from Digital Republic directly there, not the expensive part offered here.