Most humans, including you, belong to the 99.9999% of Homo sapiens that are isolated from the much smaller isolated groups left. North Sentinel Island, which is nominally governed by India, is home of one of the very few smaller ones. Its locals number in the few hundreds and have likely been there and rejected outsiders for thousands of years.
They’re known for launching spears and arrows at visitors, but their aversion towards outsiders might be what’s keeping them from going extinct. Other tribes have been decimated by disease after contact. Hopefully others continue to respect their independence.
Some other interesting tidbits https://www.atlasandboots.com/travel-blog/north-sentinel-island/