Hey @Ultralor, I hope you're doing well.
Any Samsung device sold in the United States that has a Snapdragon processor does NOT have the ability to unlock the Bootloader. This is the reason why the OEM unlock option is non-existent on your device. Even the Samsung factory unlocked devices in the US lack this ability.
This isn't Samsung's decision but rather, is Qualcomm's choice for security reasons. I haven't seen an unlocked Samsung Bootloader in years, even in the underground Android community.
I know this isn't what you were hoping for but I hope this clarifies things for you
As always, if you need anything or have any further questions please feel free to contact me.