Unfortunately this is outside of my skill set, but maybe I can inspire some skilled plugin coder to write such a thing:
Recently Micro.blog for Mac got a feature to import an exported Instagram Archive into a Micro.blog blog. Please see Manton’s writeup here:
http://www.manton.org/2018/05/instagram-import-in-micro-blog.html
For those who don’t know, you can now export all photos, comments, profile information and more from Instagram:
https://techcrunch.com/2018/04/24/instagram-export/
It would be nice to have something similar for Kirby, where I can point a future Kirby plugin to the Instagram export directory and it crunches through all photos while maintaining the captions etc.
I know not everybody is as sensible as I am to the latest brouhaha at Facebook & Co., but I think the little bit more self-control about your photos on a Kirby website would make the world a better place.