Just called OSRUI Watchband Store. One of the many many clones that I assume are selling the exact same items. These are as good as any other knock-off. No better, no worse.
So, I just got in the mail three sport loops that should be reflective from OSRUI. As you can see in the photo below, the Hyper Grape is not at all reflective, but the Pink Berry and Celestial Teal are. I have a Hyper Grape I previously got from 3C/I LOVE LUO on AliExpress that is also not reflective, however surprisingly the Pink Berry and Celestial Teal both are reflective (I hadn't tested since I tried the Hyper Grape first and it wasn't). The lugs on the Pink Berry and Celestial Teal from OSRUI are both really loose, to the point where they don't lock in on the Pink Berry, so I'll be using the ones from 3C/I LOVE LUO. It's a bit of a bummer since OSRUI's Pink Berry definitely has greater reflectivity, but I'd rather have a less reflective band than a broken watch due to the lugs not locking in.
OEM Summit White next to OSRUI Pink Berry, Hyper Grape and Celestial Teal sport loops
3C/I LOVE LUO Pink Berry left, OSRUI right
3C/I LOVE LUO Celestial Teal left, OSRUI right