The Samsung Galaxy S10 5G sold by Sprint is reportedly the Exynos-powered variant of this phone, and not the Qualcomm Snapdragon variant that may be sold elsewhere in the United States. Therefore, the former may be OEM-unlockable, whereas the latter may not. This could be an advantage in terms of custom development for the Sprint version of this super-expensive phone.
https://www.notebookcheck.net/The-Sprint-Samsung-Galaxy-S10-5G-may-be-bootloader-unlockable.427935.0.html
I thought it was the other way around, because SDs are more widely used that software could be more easily adapted.