The splattered egg appears shadowy and sometimes even translucent depending on the shader... here I am using Sildur's Enhanced Default, Complementary Reimagined, no shaders, and Complementary 4.7.2

:(

What mod verison ate you using? They had incorrect normals on some old version

hauntedharvest-1.19.2-3.1.6-fabric.jar

Is there a way I can fix this on my end?

No, not unless you can code

Do you have any plans to fix it??

Maybe if I have time but generally I don't keep supporting old versions for minor issues