OK, post properties do not carry over.
I need to think about how I want to resolve this. It’ll take some code.
I think the links themselves would carry over, but then we’re back to the problem of contrast issues for low-vision people viewing from the Facebook app, and there’s at least one of those who likes this page.
Photos I believe I’ve figured out. I’ll either need to attach a featured image using the standard featured image box, or add them directly to the content.
Checkins should be OK because location and weather data get attached automatically to the content, so there will be something, even if it’s just a weather status.
I’ll need to figure out how I want to work around book posts and other similara content.