Do we have a version of UE4 engine that supports multi-gpu's?

We want to see if we can enhance performance via using multi-gpu’s (let’s start with 2)
I’ve seen SLI support in 4.15 or 4.16 but it does not seem to support it any more in recent versions(like 4.22).
We want to use it in VR eventually but I want to see if there is any copy of engine codes that incorporates
multiple GPUs in anyway. Any pointer would be welcomed. Thanks.