How to export custom post type details with it's postmeta and images
You can use WP all Export to export and WP all Import to import on the other site.Both plugins are developed by the same company and they work great together.
The interface is pretty straightforward and easy to use.
I've been using it for years on some really large databases with a lot of required tweakings and I never had any issue.
You can use All-in-One WP Migration — WordPress Plugins for export and import both.
The interface of this plugins is really easy also you can use it for exporting the content on one website as well for importing on the other site and the other good thing is its free.