privacy android rom for Samsung phone from Latin America - eviltoast

I live in Latin America and I found out here governements dont require Samsung to OEM lock bootloader for Samsung phones, so thecnically im able to boot a custom rom unto my phone. But Im curious if this still enables us Samsung users from Latin America to boot any privacy respecting android rom, since most of them doesnt support Samsung devices at least that’s what they say on their web pages. So, do you guys think there’s a solution for us?