Testing the Facebook widget

I’m hoping if someone could test a Facebook widget for me. This is the widget that shows the most recent postings of someone’s page.
I’ve used sparkle for a couple of one page sights. In a windows software program a fb widget does not show on apple devices. I’m sure that Sparkle has no problem.
I’m thinking this may be a problem with the most recent Apple OS.
I realize this is not an exclusive Sparkle problem and I use Sparkle a lot. On more complicated sites I’m finding I’m using a windows program which I know fluently well. Many thanks.