https

Duplicator should update all the URL links from the old to the new (see step 3 of installer.php). In this case, if the old URL was https://mysite.com and you updated it to https://mysite.com then the images should update as well if the themes and plugins are using the correct PHP standards. Which is the case for most setups.

Thanks Cory, so to migrate a site from http to https is basically the same.

It should in most cases. If you run into issues here is an FAQ that may help:

? ? – I’m having issues with SSL what are my options?
? ? – https://snapcreek.com/duplicator/docs/faqs-tech/#faq-package-210-q