For anyone stumbling upon this, I have found a solution. Inside the blueprint for your material, doubleclick the POM-node to inspect it. There are switches for various platforms. Cut ties so that your end result looks like the image below for each output, and save. This will make POM function in the exact same way on Default High-End Mobile (OpenGLES 3.1, Metal and Vulkan). It will not however work in OpenGLES 2 as POM requires DDX and DDY-nodes which are not supported.
2 Likes