At least on paper, some hardware h.265 decoding is supported on Intel since Haswell (2013), on nVidia since Maxwell 2-nd gen (2015), on AMD since Polaris (2016).
Couple generations ago, AMD did the other way, they used GPU shader ALUs for video encoding/decoding. They stopped doing that because power efficiency is worse than custom silicon that’s now in all modern GPUs, even in mobile SoCs.