An Arianespace Vega C rocket will launch the Sentinel 1C mission. The launch date is currently targeted for November 15, 2024 (UTC).
Missions
Sentinel 1C:
Payload may change due to new considerations from the ESA to use a SpaceX Falcon 9 for expediting the Sentinel satellite to orbit.
https://europeanspaceflight.com/esa-targets-15-november-for-vega-c-return-to-flight-mission/