One of the things you notice with the real Pop! OS theme is that it uses its teal highlight almost everywhere, and reserves its orange secondary highlight for only a few very limited things. Marwaita Pop_os uses the orange almost everywhere instead, and it looks very different.
I don't yet know if it would fit with your build scripting, but I wonder if you could have another look at this? I'm afraid I don't know what their logic is for orange vs. teal highlights, unfortunately.