During the events of episode six of The Falcon and the Winter Soldier, Bucky, Sam and Sharon remain in contact via those earpieces that the Marvel Universe seems to have in oversupply. They speak to each other simply by speaking, even in the midst of combat, in disparate locations.
During the course of all this
Karli calls Sharon the Power Broker, which Sharon seems to confirm and points out that Sharon hired Batroc.
Wouldn't Sam and Bucky have heard this? They don't seem to take it into consideration at all later in the episode.