Cheers man! Hopefully it helped? The topology density looks pretty good for the upper body, but I'd try to make the pants/feet more similar. Right now you have really big faces for the pants, and tiny ones for the feet, which is probably not needed.
You can likely remove 2/3 of the polys on the feet, half on the hands, half on the top part of the hat, and half on the face without any impact on the silhouette and bakes quality. You can probably get rid of a few more polys on some of the details as well.
The UVs look great though, no issues there!