@valpuia
This is not possible because we select attribute family at first step of product creation and if we create attribute value or attribute at time of product creation then it will not reflect for this product
Hello PieterM.
After making the changes with command npm run watch/dev.
Make sure to run the command npm run prod for saving the changes.
Also, intstall npm in the particular package only and run all the npm commands inside the package only.
No need to make changes in resources/assets/js/app.js