In a recent interview, Sigma confirmed that currently they have no plans to release full-frame lenses for Canon RF-mount (currently Sigma only has a few APS-C lenses for Canon RF mount):
“Quick update on SIGMA RF mount lenses
A few weeks ago, SIGMA also announced that they will soon start producing a Canon RF mount version of their APS-C lenses. According to Yamaki-san, the goal is to launch all of their current APS-C lenses in RF mount by the end of this year. Moreover, he added that they currently don’t have a plan to release full-frame RF mount autofocus lenses, but “they will do their best” to meet customers’ needs. (Cined)”
