Cross play allright 🤔 but it's not fair to play mouse and keyboard on ps4 with controller! Happens a lot lately. You guy's and Girls also see this? : r/modernwarfare
PS 5 Black Ops 4 multiplayer supports keyboard/mouse players against controller players? : r/Blackops4
HORI Tactical Assault Commander Pro KeyPad and Mouse For PS4/PS3 FPS Games - Walmart.com
Amazon.com: XIM APEX Keyboard Mouse Controller Adapter Converter for PS4 PS3 Xbox One Xbox 360