Don't get me wrong, I hope that they can do it, but this proposal from META and Sage Geothermal to produce four cents per kW electricity using Thermal Electric Generators and 150-200C water seems quite unlikely imo.
Just saw an announcement come by my newsfeed with a cute promotional video, but all I found on Sage's website was a 2021 announcement of the collaboration so I'm assuming that META is just recycling the story for greenwashing to deflect from their AI carbon footprint, but maybe not.