I'm Tokyo based so bunch of local multi-billion dollar companies doing Unity. Mobile games for the most part. A good chunk of their developers or either outsourced to smaller local studios, or contractors themselves.
Unreal contracting is even better. Most of the AAA studios switched from in-house engines to Unreal. Thus constant unmet demand for expertise and production on big console projects.
Granted what counts as okay money here might not match what you are hoping for. With the up side that Tokyo is never going to run out of gamedev work.
So effectively, my work was mostly UE, because that's where the customers were.
But just out of curiosity, can you give me a hint where you found OK-paid freelance Unity work?