My Exynos S8+ SM-G955F doesn't offer this option for selection, only 2.4 GHz.
I suspect the 5 GHz option for hotspot is only available on the Snapdragon version...
For example see:
https://support.t-mobile.com/docs/DOC-34230
I suspect the 5 GHz option for hotspot is only available on the Snapdragon version...
For example see:
https://support.t-mobile.com/docs/DOC-34230