After hours of searching .. this is my simple solution in the global.js
renderProductInfo() {
...
const destinationMYpart = document.getElementById(`mypart-${this.dataset.section}`);
const sourceMYpart = html.getElementById(`mypart-${this.dataset.originalSection ? this.dataset.originalSection : this.dataset.section}`);
if (sourceMYpart && destinationMYpart) destinationMYpart.innerHTML = sourceMYpart.innerHTML;
...
where you can replace the “mypart” with your name.