In Blender, the emission on the circuits flows as intended
In Babylon.js, that emission for the circuits does not even show, much less flow as intended
I assume you are expecting your custom shader created in Blender’s shader editor to work in Babylon.js. Unfortunately, it won’t work… You need to recreate your moving shader in Babylon.js. Luckily, Babylon.js has awesome node material editor.
To get started you may also want to take a look at this moving shader example