if people want to do research on their own here, are some sources you can look into
this has it around $100B: https://t.co/BrL2ZDNr0N
this has it at $233B but includes Anduril, Waymo, some other ones in defense & autonomous vehicles most people wouldn't consider private robotics: https://t.co/dLUVi4ndcO
this has it at $133B: https://t.co/zxt2NwZWVF
always important to do your own research and draw your own conclusions
but yea it really is wild when you think about it