It seems that Discourse doesn’t see that Google image links are images in order to know to download them locally.
I noticed this first on a multi-site instance, and then checked on try.
Here’s this url
https://photos.app.goo.gl/KXa79xi3R82sjisX8 that renders beautifully into an image, but it never gets pulled down locally. I think it’s because the stupid Google doesn’t make those URLs end in .jpg the way God intended and there’s nothing that can be done, but I thought I’d ask anyway.