Did a little digging. I thought GPS might be first, but that is MEO. Iridium was first, true, and the business failed. OneWeb had their first launch a few months before Starlink. They also went bankrupt. I think the common element is space stuff is expansive and you have to have enough cash to weather the setbacks.
SpaceX has it all in-house which has certain advantages in keeping launch vehicles and satellites on the same page. In the case of Starlink v2 becoming the v2-mini, adapting to the lack of planned launch vehicle. Two separate companies would likely be months of development time burned before the pivot. Which makes me guess this is why Amazon LEO is in an jam and are now buying launch from SpaceX and others because Blue Origin is far behind. It’s a tough business.