I found similar questions, dated by past time, but still they have no answer.
Is Device fission supported for AMD GPU in APP SDK 2.9? And if not, will it be added in any observable future?
No, Device Fission is supported only on CPU as of now. But may I know what do you want to use that feature for on GPU?
If your requirement is to run different kernels concurrently, you could do that by launching each kernel through separate command queues. The concurrent kernel feature is supported on AMD's Southern Islands architecture GPU and above.