Hi there @hoya9802 and welcome to the NVIDIA developer forums.
Every new GPU released by NVIDIA will support CUDA unless explicitly stated otherwise.
So yes, all of the new 40 series GPUs do support CUDA. You only need to make sure to install the latest drivers that support the GPU of your choice and you are good to go.
The sites stating compatibility are updated semi-automatically so it takes a while until new product names propagate to all places.
Thanks!