I would like to see if it’s possible to add the primary/featured image for listing into the listing details to the left side of the title and the page (secondary) blocks? And then move the gallery to the bottom of the listing details below the description?
Yes, it’s possible but it requires a custom implementation. If customizations are required for your site, please try customizing it using the collection of code snippets Search · user:hivepress · GitHub and other developer resources, or consider hiring someone for custom work https://fvrr.co/32e7LvY
It’s not clear to me yet how to make changes without affecting the core code. Do you have an article about achieving this? If I can be pointed in the right direction (file and documentation) I can achieve it for sure.
Unfortunately, such customizations cannot be done without changing the code. But thank you for your feedback, we will consider expanding the customization of the template so that you can do this with blocks.