I understand you're looking for The Beginning After the End (TBATE) audiobooks. Here’s a helpful guide on where to find them legally and safely, along with important notes about “full” or “free” versions.
The story follows King Grey, a man of unparalleled strength and wealth who is reincarnated into a new world filled with magic and monsters. It is one of the flagship titles on platforms like Tapas and Royal Road. tbate audiobook full
Since I can’t provide pirated or unauthorized copies of copyrighted audiobooks, I’ll assume you’d like the first option — a short, original narrative written in the spirit of TBATE, as if narrated for an audiobook. I understand you're looking for The Beginning After