They did. They bought a great mobile backend called Parse and shut it down. Some of us who had to deal with it still have bad memories.

Parse was a mobile backend as a service platform originally developed by the provider Parse, Inc. The company was acquired by Facebook in 2013 and shut down in January 2017.[1][2] Following the announcement in 2016 of the impending shutdown, the platform was subsequently open sourced.

https://en.m.wikipedia.org/wiki/Parse_(platform)