Early Bantu speakers crossed through the dense Central African Rainforest 4,000 years ago

[The Wall Is Undefeated!]

A research paper about the Bantu Migration was released at the start of August 2022. According to the paper, the Bantu Migration started a little over 4000 years ago, they migrated through the rainforest and the rainforest didn't impede agriculture all that much.

Here's the paper and a basic summary paper
Phylogeographic analysis of the Bantu language expansion supports a rainforest route
Early Bantu speakers crossed through the dense Central African Rainforest 4,000 years ago

 

[King Sun]

So the land bridge theory is proving to be the most vaild one