Like I said, ARM support was in delgon cpuminer-gr repo. It had some changes so it compiled fine on ARM, not like improvements, more like compatibility.
I also never even noticed raptoreum github had cpuminer repo it was never linked anywhere so I did not scan every single repo they had on their GitHub account. All links on the site and given to ppl on discord were from the dev repo in the beginning. After some time they were switched to Wyvern repo with current cpuminer-gr-avx2