EDIT: Thanks to Robert M for having pointed out in the comment section that there is a patent for a very similar lens.
Canon might release a Canon RF 24-105mm f/2.8L IS for the EOS R system, according to a new rumor.
A low rated rumor (by the source itself) suggests Canon might soon release an RF 24-105mm f/2.8L IS lens. Says the source:
[…] we have an anonymous report that Canon plans to announce a Canon RF 24-105mm f/2.8L IS in the first half of 2023. On the surface, that is a lot of overlap of focal ranges. There is the RF 24-70 f/2.8L IS, RF 24-105 f/4-7.1 IS STM and the RF 24-105mm f/4L IS. Adding a 4th lens to this range just doesn’t feel likely. It does remind us of the EF 24-70 f/4L IS Macro, a lens a lot of people thought didn’t make sense with the overlap, but actually turned out to be a pretty popular lens.
Time will tell. In the meantime, stay tuned.
Source: Canon Rumors