This Unreal 5.3 Gameplay Ability System video is about adding a Movement Speed set of Upgrade Cards.
We start by adding the Move Speed Multi Card entries to the Enum, and then we add the Move Speed Multi Attribute, and add a Attribute Changed Delegate to the Character class which updates the MaxWalkSpeed. Next we update the Map variables in the Game Instance Blueprint, and then create the Move Speed Multi Gameplay Effect. The Award Upgrade function is then updated to include the values for the Move Speed Multi Upgrades, and lastly, we show an example of Movement Speed change gameplay.
https://dev.epicgames.com/community/learning/tutorials/vwL2/unreal-engine-39-player-progression-upgrade-system-movement-speed-let-s-make-a-top-down-shooter