I think Google invests a lot. Look at CapitalG, GV etc. And now within Google itself, 2 projects which I think are aiming to become platforms: Stadia, Fuschia.
Personally, I have been disappointed with Google in the AR front. Haven't heard much about investments/ acquisitions. OTOH, Apple has been acquihiring small teams, investing in microLEDs etc. Though, overall Alphabet's investments are much diverse.