Need some advice with muscle anatomy

More specifically: Are the muscles in the right place and do they look natural? If not, in what ways can I improve? I'd like some advice on this image...

The legs are cut off cuz I'm not too sure what to do beyond the knees

...and this one (the example on the right not the malnourished one on the left)

https://preview.redd.it/6yqx3451nkv81.png?width=1400&format=png&auto=webp&s=5db0513db6622474983954cf9436bef23665f3c8

If there's anything else that you noticed that looks out of place, please let me know. I'm trying to improve anyway I can.