I got the S10 recently, and when I went into developer options, the "OEM Unlock" option is missing. This confuses me since I ordered a Hong Kong model (SM-G9730) that supposedly allows for an unlockable bootloader according to people here and elsewhere. Would appreciate it if someone could help shed some light on this. If it matters, in Settings > About Phone, it definitely says SM-G9730 is the model, and under Software Information, the build number is G9730ZHU1ASBA, which is apparently the February 2019 build date.