Netflix has given multiple devices green light to display HD and HDR images.
The Galaxy S10, S10e and S10 + are included in the HDR area, Netflix says on the relevant support page. They now also support HD.
Not all smartphones that have the computing power and codecs for Netflix in hd, can also stream Netflix in hd. Netflix should therefore give it a green light, something that, for example, it immediately withdraws when users have their device or have a custom ROM installed. The installation of Widevine drm is also required, which only manufacturers can do.