Sigma is rumored to announce their first lenses for Canon RF mount in February 2024:
"In a recent conversation that we had with an employee of a Sigma distributor in a certain country that we cannot name, we learned that February may finally be the month that we hear something from the Japanese third-party manufacturer. February is likely to be a big month for the RF-mount. During the conversation, we learned that Sigma will likely show off, or at least talk about two RF/RF-S mount zoom lenses and a RF/RF-S prime lens early next year. The distributor hasn't been privy to the exact products Sigma plans to introduce, but they have been notified about the coming demand RF/RF-S lenses would bring."
Rumors about Sigma lenses for RF mount have been circulating for a while:
Sigma’s CEO confirms the possibility of making mirrorless lenses for Nikon Z and Canon RF mounts
