Is the protocol support for nvlink complete for the 3090 graphics card?

What are the differences between V100 and 3090 connected using an nvlink bridge? Does the 3090 with nvlink support NVLINK UMA.I am using two 3090 graphics cards for neural network training. I want to enable one GPU to obtain training data through another GPU. I would like to know if two 3090 graphics cards with nvlink allow me to develop such a GPU data sharing framework