https://wccftech.com/call-of-duty-modern-warfare-cross-progression/

It appears that Call of Duty Modern Warfare cross-progression is being supported between PC, PlayStation 4 and Xbox One.

Activision kicked off the game’s open beta yesterday and as reported by Charlie Intel, PlayStation 4 players who linked their Battle.net, Xbox Live and PSN accounts to the same Call of Duty account, are reporting that user stats and progression are actually showing up on all platforms.