No experience running them, but looking at samsung digital signage, HDR looks to be a feature of their high end models and extremely expensive. ~$4,500 for a 55" 4K TV [0]. The more competitively priced displays[1] (~$1300 for 70" 4K) don't seem to offer it.
[0]: https://www.samsung.com/us/business/products/displays/pro-tv...
[1]: https://www.samsung.com/us/business/products/displays/4k-uhd...