If Agent Carter is part of the MCU still, so are the Netflix shows and Agents of SHIELD, season 1 had, Nick Fury, Sif and Maria Hill in it, Abomination was mentioned, the events of Winter Soldier with the Hydra reveal, the show impacts the films, as I mentioned fore Coulson was key to building the Helicarrier that shows up in Age of Ultron, getting intel on Strucker's base for the Avengers, setting up the start of Age of Ultron, the events of Civil War was mentioned in season 3. and the Accords were a sub plot in season 4. Thanos was namedropped several times in season 5, what happened in New York early on in infinity War as mentioned. The Quantum Realm was mentioned and used in the final season and Sousa from Agent Carter shows up in the final season as well.