For Linux amdgpu driver (18.40 or later):
VEGA56 opencl platform = 0
RX580x2,570x5 opencl platform = 1
And, only VEGA recognizes and works, RX series does not work.
In the case of TeamRedMiner, both opencl platform = 0 and 1 are recognized and all work.
Will WildRig Multi not be able to run all GPUs?
Right now there is a known bug with this, yes. And simultaneously only Vega or RX's will work. I will fix it someday later, right now have not much time to work on miner.