There is very little information on them, but they left evidence and stories all over. Off the top of my head

• the native Hawaiians maintain that there were people who lived there already when they themselves got to Hawaii. They called them the Menehune. Most modern descriptions label them as an ancient, mythical people but the original Hawaiian descriptions did not portray them this way. They firmly maintained that people lived there before them and they all shared the island for untold generations.
• the Olmec colossal heads in Mexico are likely depictions of these people
• the Ishak and the Uma, two native people from the Louisiana Coast were tiny, and very very dark to black skinned people who did not share cultural or physical similarity with the taller native groups throughout the rest of North America.

I know at least one of their stories comes from a time of dramatically different ocean levels. They passed down that when the ocean rises and won’t stop, you have to walk to San Antonio essentially. Compared to elevation maps of a full melt, they are right. They also have stories of the entire bottom half of Louisiana disappearing and eventually showing back up.

• one of the oldest stories passed down by the Gunditjmara people of Australia that can reliably be dated and located in Australia, is from 40k years ago. They have older stories, the oldest being 100k years. But they deal with the sky so scientists say they were in Africa at that time. Though they maintain they were not. There are also native Australian stories of tiny seafaring master builders, just like in Hawaii.

Everywhere I’ve mentioned had very ancient, giant structures. In some places, only the foundation remains. Everyone always remembers how deft these people were at building. They were always remembered as being small. They had black skin and African features. They are from so very long ago that they must have come from Africa.

It makes sense that the first successful sailors were tiny. They would need dramatically less space and less food. We already know Africa has an ancient, genetically destinct line of tiny people.

You can’t just Google up any information on any of this unless you already know specifically what you are looking for. Colonized history absolutely will not abide information about a powerful, ancient Africa. The whole of the European historical record is now and has always been, overtly hostile to it, but the proof is everywhere.

You can find it in first accounts, ancient depictions and stories, and absolutely beyond ancient foundations. I mean, even giant Greek and Roman buildings, themselves ancient, have been found to be built on foundations that make the current structures seem young. There was a people doing great works all over, a long time ago, and Europe would rather deride it as “ancient aliens”, than the simple, evidence based truth.