Canon continues to discontinue many EF lenses as they move everything over to the RF mount. The latest lens to be discontinued is the Canon EF 24mm f/1.4L USM II. We are hoping that this tells us that Canon will be announcing fast and wide RF L prime lenses in the near future. The Canon RF 35mm f/1.2L USM has been rumored for a very long time.
We did have a recent report that Canon planned to address the 24mm and 35mm lens options soon, along with the mention of an RF 28mm f/1.4L USM.
There will likely be available inventory of the Canon EF 24mm f/1.4L USM II for quite some time.