

They are for anything that’s E2E encrypted such as Messenger and WhatsApp, so that the link isn’t revealed to Meta servers.
As far as I know, for things like posts on Facebook, the server does the scraping. This is especially the case in the web version, since client-side scraping of arbitrary sites would require those sites to have an open CORS policy, which comes with security risks.
There’s a Sharing Debugger tool on the Facebook developer site that lets you force rescrape a site.
I started playing Breath of the Wild recently. I haven’t played a Zelda game in 20 years - the last one I played was Minish Cap back in 2005. I’m enjoying the open-world aspect of it. I’ll be playing it for a while - I have maybe an hour per night, a few nights per week, to play games so it takes me quite a while to complete anything.