Jellyfin supports 4K HDR playback depending on the client. I don't personally use Infuse but I believe it supports 4K playback depending on the hardware it is running on.
Infuse does, but that's part of the paid 'Pro' version (in-app upgrade). I haven't done it yet because most of my content is still 480p! But I may once I start getting more 4K content.
geerlingguy|4 years ago