This is for orbital data centres and the business case seems pretty tenuous compared to comms systems like Starlink. The actual FCC application is here:
https://fccprod.servicenowservices.com/icfs?id=ibfs_application_summary&number=SAT-LOA-20260108-00016
although you need to register to be able to download the details. As far as I can see this would be launching solar powered data centres to support AI so hopefully that bubble will burst well before this gets anywhere. The proposal would be to put most of the satellites in high (up to 2000 km) Sun Synchronous Orbits (SSOs) so that they remain illuminated most of the time. That would be a nightmare for astronomy within a few thousand km of the terminator where these things would be visible well beyond astro twilight.