Developed from the ground up with AMD, Borderlands 3 will take full advantage of the most powerful PC hardware available and is optimized for top performance and incredible gaming experiences on AMD Radeon™ graphics cards and Ryzen™ CPUs.
Experience it September 13th, 2019, Powered by AMD!
Considering that your PS4, and Xbox is powered by AMD, this really shouldn't be news.
Sony’s bespoke API certainly won’t help AMD on PC, and with Xbox I get the impression that while most games would technically be using DX12, because of Xbox specific hardware extensions, and the general lack of DX12 compatible GPUs in consumers hands, Xbox games are probably still ported from DX12 to DX11 just to reduce the variables in production by giving PC a single API to target.
This game looks like it will run well on everything so long as it gets good multicore cpu support.
So everyone should be happy with their performance. AMD tossing their name in with a fun game is a good pr move.
But if you look at relative arch performance, this game looks like it is powered by Kepler