

My Note 20 Ultra (US) came out like 5+ years ago and you can’t unlock the bootloader. There was a workable hack job that was possible for a little while, but even that got patched up through a firmware update back in like 2021, and there’s no way to roll back firmware anymore, either.
In third world countries I think Samsung’s allows you to unlock the bootloader. Open developer options and see if there’s a tic box for “OEM unlock”