There are at least 3 more PowerZoom lenses coming in 2024! According to CR3, Canon will launch an internal zoom RF 70-200mm f/2.8L IS USM Z likely in the next 4-6 months.
Moreover, there are two more PowerZoom lenses now in the works, one of them will be a full-frame wide angle L zoom lens and an RF-S version of the EF-S 17-55mm f/2.8 USM, a lens a lot of APS-C shooters would love to see.
Maybe, Canon even also announce Canon RF-S 15-60mm f/2.8 IS USM Z lens! As we all know, Canon never put the L designation on EF-S lenses. They could do it for RF-S if they wanted to, but we’ll have to wait and see.
See also: Canon RF Lens Roadmap